UPSC Prelims 2016 Question Paper with Answers

Statement 1 is correct and Statement 2 is incorrect. Statement 1 is correct: Article 243F of the Constitution (added by the 73rd Amendment, 1992) disqualifies a person from contesting a Panchayat election if they have not attained the age of 21 years — this is distinct from the 18-year voting age. Statement 2 is incorrect: Article 243E(4) mandates that elections to constitute a Panchayat must be completed before the expiration of its term or within six months of its premature dissolution. However, the route for judicial intervention described — the State Election Commission seeking Supreme Court intervention when elections are not held within six months — is not a constitutional procedure. The SEC's constitutional mandate is to superintend, direct, and control elections; parties aggrieved by non-conduct of elections can directly approach High Courts or the Supreme Court. UPSC 2016 confirmed '1 only' as the answer.

Statement 2 is correct; statement 1 is incorrect. The distinction is between PROROGATION (ending of a session) and DISSOLUTION (ending of the Lok Sabha itself). (1) PROROGATION OF LOK SABHA — INCORRECT. Prorogation simply means terminating a SESSION of the Lok Sabha (not the House itself). When the Lok Sabha is prorogued, all PENDING BILLS DO NOT LAPSE. They remain alive and continue in the next session. Only ADJOURNED matters can be carried forward in the same session, but pending bills survive prorogation. So statement 1 is wrong — bills do NOT lapse on mere prorogation. (2) BILL IN RAJYA SABHA NOT PASSED BY LOK SABHA — CORRECT. The Rajya Sabha is a PERMANENT HOUSE — it is never dissolved. One-third of its members retire every two years. So bills pending in the Rajya Sabha are NOT affected by the dissolution of the Lok Sabha. The rules under Article 107(5): (a) A bill pending in the Lok Sabha (whether originated in Lok Sabha or transmitted from Rajya Sabha) LAPSES on dissolution of the Lok Sabha. (b) A bill that has been passed by the Lok Sabha and is pending in the Rajya Sabha LAPSES on dissolution of the Lok Sabha. (c) A bill pending in the Rajya Sabha but NOT YET PASSED by the Lok Sabha does NOT lapse on dissolution of the Lok Sabha — it survives in the Rajya Sabha. (d) Bills passed by both Houses but pending Presidential assent do NOT lapse. (e) Bills passed by both Houses but returned by the President for reconsideration do NOT lapse. SUMMARY: Statement 1 confuses prorogation with dissolution; statement 2 correctly captures the asymmetric treatment of the permanent Rajya Sabha versus the temporal Lok Sabha. Hence only 2 — Option B. UPSC 2016 official answer: B.

Both statements are incorrect. (1) APPOINTED BY GOVERNOR — INCORRECT. The Chief Secretary is the most senior IAS officer in a state and the administrative head of the state secretariat. The CHIEF MINISTER selects the Chief Secretary from among the senior IAS officers of the state cadre. The formal appointment is made BY THE STATE GOVERNMENT in the name of the Governor (as is the case with all executive actions under Article 166), but the Chief Minister effectively selects the officer. The Governor does NOT independently appoint the Chief Secretary — that would violate the principle that the Council of Ministers (headed by the Chief Minister) advises the Governor in all executive matters. The phrasing "appointed BY the Governor" is misleading — although technically all state appointments are made in the Governor's name, they reflect the Chief Minister's decision. INCORRECT. (2) FIXED TENURE — INCORRECT. The Chief Secretary does NOT have a fixed tenure. The office is exempted from the standard tenure system that applies to many other senior posts. The Chief Minister can change the Chief Secretary at any time, and many do so for political or administrative reasons. The Department of Personnel and Training (DoPT) Guidelines have, in some periods, recommended a minimum tenure of 2 years for senior posts, but the Chief Secretary post specifically has been excluded from such tenure protection. Many states have seen frequent changes in Chief Secretary, with some lasting only a few months in the post. INCORRECT. CONTRAST: The Cabinet Secretary at the Centre is APPOINTED BY THE PRIME MINISTER and (in practice) given a fixed tenure of 2 years (extendable up to 4 years). The Director of CBI, Director of IB, Director of RAW, and Chief of Defence Staff have minimum fixed tenures by law. But the Chief Secretary at the state level does not. Hence Neither 1 nor 2 — Option D. UPSC 2016 official answer: D.

Under ARTICLE 249 of the Constitution, the Parliament can legislate on a matter in the STATE LIST if the RAJYA SABHA passes a resolution by a SPECIAL MAJORITY (not less than TWO-THIRDS of its members present and voting), declaring it necessary or expedient in the NATIONAL INTEREST. This is one of the special powers conferred on the Rajya Sabha as the "Council of States" — recognising its role in protecting state interests while allowing for national-level intervention when needed. KEY DETAILS: (a) The resolution remains in force for ONE YEAR (extendable by similar resolutions for further periods of one year each). (b) The law made by Parliament under this provision lapses 6 months after the resolution expires. (c) The state legislatures still retain their power to legislate on the same subject — Parliament's law just OVERRIDES any state law to the extent of inconsistency, and only while the resolution is in force. WHY RAJYA SABHA AND NOT LOK SABHA? Because the Rajya Sabha represents the STATES, only its consent (by special majority) is constitutionally meaningful for invading the State List. The Lok Sabha represents the people directly, not the states. RELATED PROVISIONS: (a) Article 250 — Parliament can also legislate on State List subjects during a Proclamation of Emergency (Article 352). (b) Article 252 — Parliament can legislate on State List if two or more states pass resolutions requesting it. (c) Article 253 — Parliament can legislate on State List to implement international treaties/agreements. (d) Article 356 — During President's Rule, Parliament exercises State Legislature's functions. (a)/(b) Lok Sabha resolutions — Wrong; Lok Sabha has no such power. (c) RS simple majority — Wrong; requires special two-thirds majority. UPSC 2016 official answer: D.

India's Capital Account in the Balance of Payments (BoP) includes Foreign Loans (ECBs, NRI deposits), Foreign Direct Investment (FDI), Foreign Portfolio Investment (FPI), and Banking Capital (cross-border flows in bank assets and liabilities). Private remittances and tourism receipts are classified under the Current Account (transfers sub-account and invisibles respectively), making Option B incorrect. The Trade Balance (exports minus imports of goods) is the Current Account's merchandise component, not a Capital Account item — ruling out Option C. Option D mixes a Current Account item (private remittances) with Capital Account items. The distinction between Capital and Current Accounts is a frequently tested UPSC concept; capital flows involve changes in ownership of foreign assets/liabilities, while current flows do not.

The Marginal Standing Facility (MSF) Rate is the interest rate at which scheduled commercial banks can borrow overnight funds from RBI by pledging government securities, acting as an emergency liquidity window set 25 basis points above the repo rate. Net Demand and Time Liabilities (NDTL) is the sum of a bank's demand liabilities (savings accounts, current accounts, demand certificates of deposit) and time liabilities (fixed deposits, recurring deposits) — it is the base on which CRR (Cash Reserve Ratio) and SLR (Statutory Liquidity Ratio) are calculated. Both are core monetary policy and banking regulation concepts administered by RBI under the RBI Act, 1934 and the Banking Regulation Act, 1949. The MSF was introduced by RBI in its 2011-12 monetary policy as part of the new Liquidity Adjustment Facility (LAF) framework. UPSC tests these banking terminology questions to distinguish candidates with deep monetary policy knowledge.

RBI introduced the MCLR framework from 1 April 2016 to replace the earlier Base Rate system, with the primary purpose of making the lending rate determination process more transparent and ensuring faster transmission of monetary policy changes to actual loan rates. Under the Base Rate system, banks had wide discretion in setting lending rates, leading to slow and incomplete transmission of RBI's repo rate cuts to borrowers; MCLR standardised the methodology using the marginal (not average) cost of funds. Studies show that during the MCLR regime, a 100 basis point repo rate change resulted in 26-47 basis points transmission to lending rates, compared to only 11-19 basis points under the Base Rate regime — a significant improvement. MCLR is not a liquidity measure (Option A), not specifically targeting small borrowers (Option C, though they benefit), and not about loan size sectoral guidelines (Option D). From October 2019, RBI further mandated that most new retail and MSME loans be linked to external benchmarks (repo rate), superseding MCLR for new loans.

RBI's Differentiated Bank Licence framework (2015) simultaneously serves two objectives: functional specialisation and financial inclusion. Payment Banks can receive deposits (up to ₹2 lakh) and provide payment services but cannot lend, while Small Finance Banks can accept deposits and lend to underserved segments such as small farmers, micro industries, and migrant workers — both represent specialised, limited banking functions (fulfilling Option B). These differentiated banks were designed to bring unbanked and underbanked populations into the formal financial system by offering suitable, simplified products (fulfilling Option C). Since both objectives are served simultaneously, Option D ("Both") is the correct answer. This framework emerged from the Nachiket Mor Committee (2013) recommendations on financial inclusion. The differentiated bank model contrasts with universal banks (SBI, HDFC, etc.) which perform all banking functions. UPSC tested whether candidates recognise the dual-purpose design of this policy.

Both statements correctly describe the GST Council as established under Article 279A of the Constitution (inserted by the 101st Constitutional Amendment Act, 2016). The Union Finance Minister is the Chairperson; the Union Minister of State (Finance/Revenue) and the Finance/Taxation Minister of each State are members (Statement 1 correct). The GST Council makes recommendations to the Union and the States on goods and services to be taxed or exempted, GST rates and rate bands, threshold turnover limits, principles governing place of supply, special provisions for certain states, and other related matters (Statement 2 correct). Decisions in the GST Council require a three-fourths majority of members present and voting, with the Centre having one-third of total votes and all states together having two-thirds. The Council is a joint democratic decision-making body representing India's cooperative federalism in taxation. UPSC 2016 asked this before GST was formally implemented (it was launched in 2017).

Statement 1 is incorrect: the premium is not uniform across all seasons — farmers pay a maximum of 2% for Kharif food and oilseed crops, 1.5% for Rabi food and oilseed crops, and up to 5% for annual commercial and horticultural crops; the remaining actuarial premium is borne by state and central governments in a 50:50 ratio (90:10 for North-Eastern states). Statement 2 is correct: PMFBY (launched January 2016, replacing NAIS and MNAIS) provides comprehensive coverage of the crop cycle from pre-sowing to post-harvest, including coverage for post-harvest losses caused by cyclones and unseasonal rains — farmers can claim for losses in the field after harvest for up to 14 days. The scheme is administered by the Ministry of Agriculture and Farmers' Welfare through empanelled insurance companies. PMFBY is a significant agricultural risk management tool, with premium subsidies making it accessible to small and marginal farmers. Hence 2 only.

All three statements are correct objectives of the National Manufacturing Policy (NMP) 2011, announced by the Government of India through the Ministry of Commerce and Industry. The NMP targeted increasing manufacturing's share of GDP from about 15-16% to 25% by 2022 (Statement 1 correct). It proposed the creation of National Investment and Manufacturing Zones (NIMZs) — large, integrated industrial townships with world-class infrastructure, skill development facilities, and administrative ease — as greenfield manufacturing hubs (Statement 2 correct). The NMP targeted creating 100 million additional jobs in manufacturing by 2022, recognising the sector's role in absorbing India's large labour force (Statement 3 correct). By 2022, the targets were largely unmet due to structural challenges — manufacturing's GDP share remained around 17-18%. The NMP (2011) framework preceded Make in India (2014) and the Production Linked Incentive (PLI) schemes (2020), which built on its objectives with more specific incentive structures.

The Logistics Performance Index (LPI) measures a country's logistics environment and competitiveness across six dimensions: customs efficiency, infrastructure quality, ease of arranging international shipments, logistics services quality and competence, tracking and tracing capability, and timeliness of delivery — Statement 1 is correct. The LPI is published biennially by the World Bank (not the World Economic Forum — Statement 2 is incorrect); the WEF publishes the Global Competitiveness Index and other reports. India ranked 38 out of 139 countries in the LPI 2023, improving from rank 54 in 2014 — a 16-place improvement attributed to PM GatiShakti National Master Plan, National Logistics Policy (2022), and the Unified Logistics Interface Platform (ULIP). The LPI is used by governments and businesses to benchmark logistics performance and identify areas for trade facilitation improvement. Statement 2's error (WEF vs World Bank) is the classic UPSC trap in report-publisher questions. Hence 1 only.

Both statements are broadly correct. Pradhan Mantri Mudra Yojana (PMMY), launched on 8 April 2015, provides collateral-free loans of up to ₹10 lakh (under three categories — Shishu up to ₹50,000; Kishore ₹50,001-5 lakh; Tarun ₹5-10 lakh) to non-corporate, non-farm micro and small enterprises, thereby bringing informal/unorganised sector entrepreneurs into the formal credit system through the Micro Units Development and Refinance Agency (MUDRA) — Statement 1 is broadly correct. PMJDY's primary objective is comprehensive financial inclusion — providing bank accounts to unbanked households to enable savings, remittances, credit, insurance, and pension access; promoting savings among the poor is a core component of this financial inclusion mandate — Statement 2 is broadly correct. Both schemes are pillars of India's Jan Dhan-Aadhaar-Mobile (JAM) trinity framework for direct benefit transfers and financial empowerment. UPSC tested the characterisation of both schemes in 2016.

The Gold Monetization Scheme (GMS), launched by the Government of India in November 2015 (replacing the earlier Gold Deposit Scheme 1999 and Gold Metal Loan Scheme), sets the minimum deposit at 30 grams of raw gold (of any purity — coins, bars, jewellery) — making Option B correct. Deposits can be made at Collection and Purity Testing Centres (CPTCs) accredited by the Bureau of Indian Standards. The scheme offers interest-bearing short-term bank deposits (1-3 years at 2.25% per annum), and medium-term (5-7 years) and long-term (12-15 years) government deposits. Banks can lend or sell the deposited gold to jewellers or auction houses, thereby mobilising India's estimated 25,000+ tonnes of household gold (the largest private gold hoard in the world). The scheme aims to reduce India's dependence on gold imports (India is the world's second largest gold consumer) and curb the current account deficit. The minimum 30-gram threshold was specifically set to make the scheme accessible while ensuring operational viability for testing centres.

FSDC (Financial Stability and Development Council) is not an organ of NITI Aayog — Statement 1 is incorrect. The FSDC was set up by a Cabinet decision in December 2010 under the Ministry of Finance as a non-statutory apex-level body, chaired by the Union Finance Minister (Statement 2 correct). Its members include the RBI Governor, SEBI Chairman, IRDA Chairman, PFRDA Chairman, Finance Secretary, Secretary (Financial Services), and Chief Economic Adviser. The FSDC was created to institutionalise the mechanism for maintaining financial stability, financial sector development, inter-regulatory coordination, and macroprudential supervision of the economy including oversight of large financial conglomerates (Statement 3 correct). The idea for FSDC was first mooted by the Raghuram Rajan Committee (2008) on financial sector reforms. Since FSDC is a non-statutory body under the Finance Ministry — not under NITI Aayog — Statement 1 is clearly wrong. Hence 2 and 3 only.

All three — Dibang, Kameng, and Lohit — are tributaries of the Brahmaputra. The Dibang and Lohit are left-bank tributaries that join the Brahmaputra in Arunachal Pradesh; the confluence of the Lohit with the Brahmaputra creates one of the widest river channels in the world near Sadiya. The Kameng (also called Jia Bhoreli in Assam) is a right-bank tributary that rises in Arunachal Pradesh and joins the Brahmaputra near Tezpur. Together with the Brahmaputra, these rivers drain a vast part of north-eastern India and the eastern Himalayas. The Brahmaputra system is known for its antecedent drainage and carries enormous sediment loads, making Assam highly flood-prone.

About 97–98% of India's coal reserves are found in Gondwana rock formations of Permian age (approximately 250–300 million years old), formed when India was still part of the Gondwana supercontinent. These high-quality bituminous and coking coals are distributed across the valleys of the Damodar, Son, Mahanadi, and Godavari rivers in Jharkhand, West Bengal, Odisha, Chhattisgarh, Madhya Pradesh, and Telangana. The Damodar Valley coalfields (Raniganj, Jharia, Bokaro) are the most important. Tertiary coal (lignite or sub-bituminous) forms the remaining 2–3% and is found in Assam, Meghalaya, Jammu & Kashmir, and in the Neyveli lignite basin of Tamil Nadu. Archean rocks are metamorphic basement rocks containing virtually no coal; the Deccan Trap is volcanic basalt that has no coal seams.

Only Statement 1 is correct. Rice consistently occupies the largest area under Kharif cultivation in India, with around 40–44 million hectares sown every year; West Bengal, Uttar Pradesh, Punjab, and Andhra Pradesh are the leading states. Statement 2 is incorrect: cotton area (approximately 11–13 million ha) is substantially larger than sugarcane (approximately 5–5.5 million ha); sugarcane is not even the second-largest Kharif crop in terms of area. Statement 3 is incorrect: cotton cultivation area has not shown a consistent decrease — it has remained broadly stable and has even expanded in some years due to Bt cotton adoption, though area may fluctuate year to year based on prices. UPSC often tests comparative area statistics among Kharif crops to distinguish rice, cotton, and sugarcane in the correct order.

Statements 1 and 3 are correct. Uttar Pradesh has the largest net irrigated area of any state in India, largely through canal irrigation (Upper Ganga Canal, Sarda Canal system) and groundwater (tube wells); it is the largest producer of wheat and sugarcane. Micro-irrigation (drip and sprinkler systems) significantly reduces fertiliser consumption by enabling fertigation — the precise delivery of fertiliser dissolved in irrigation water directly to the root zone — minimising runoff and leaching; this can reduce fertiliser use by 20–30% compared to flood irrigation. Statement 2 is partially correct but overstated: while PM Krishi Sinchayee Yojana and other schemes promote drip irrigation for high-value crops like sugarcane, cotton, banana, and grapes, drip irrigation in India is actually most widespread in horticulture crops and fruits, not dominated by sugarcane and cotton in a simple either/or sense.

Statements 1 and 3 are correct. The Deccan Plateau is a vast triangular landmass bounded in the north by the Satpura and Vindhya ranges, in the west by the Western Ghats, and in the east by the Eastern Ghats. The major Deccan rivers — Godavari, Krishna, Cauvery, and Mahanadi — all flow from west to east (from the Western Ghats) and drain into the Bay of Bengal, forming some of India's most fertile deltas on the eastern coast. Statement 2 is incorrect: the Deccan Plateau slopes generally from west to east (not east to west); the Western Ghats form the high western escarpment of the plateau (often rising to 1,200–2,600 m), and the plateau gradually descends toward the Eastern Ghats and the Bay of Bengal. This west-to-east slope is precisely why the rivers flow eastward.

The International Date Line (IDL) deviates significantly from the 180° meridian specifically to avoid splitting countries, island groups, and territories between two different calendar days. Key deviations include: bending eastward around the Chukchi Peninsula of Russia (to keep Russia on a single date), bending westward around the Aleutian Islands of Alaska (to keep them on the same date as mainland USA), and most dramatically bending far east around the Kiribati Island group (which in 1995 moved the date line east so that the whole country, including the Line Islands at 150°W, would be on the same date). If the IDL followed exactly the 180° meridian, it would bisect countries and island chains, creating administrative chaos. The IDL has no astronomical basis — it is an international convention adopted in 1884 at the International Meridian Conference.

The Bodhisattva concept is central to Mahayana Buddhism, NOT Hinayana (Theravada) — so Statement 1 is incorrect. Statements 2 and 3 are correct: a Bodhisattva is a being who has attained enlightenment but delays entry into nirvana out of compassion to help all sentient beings reach liberation.

Statement 1 is correct: Eripatti was land revenue reserved for village tank maintenance in South India. Statement 2 is incorrect: Taniyurs were villages granted exclusively to temples (devadana), not to Brahmins — villages donated to Brahmins were called Brahmadeya. Statement 3 is correct: Ghatikas were educational institutions attached to temples in South India.

Both statements are correct about Krishnadevaraya's (1509–1529) revenue system in the Vijayanagara Empire. Land tax varied based on crop type and soil quality. Additionally, workshop and craft owners paid an industries tax. This information is corroborated by the accounts of Portuguese traveller Duarte Barbosa and by the Amuktamalyada composed by Krishnadevaraya himself.

The Swadeshi Movement (1905–1908) was launched in response to Lord Curzon's Partition of Bengal (1905). For the first time in Indian nationalist politics, boycott of British goods and promotion of Indian-made goods were formally adopted as tools of resistance. The movement was centred in Bengal but spread to other parts of India and laid the ideological groundwork for the later Non-Cooperation Movement.

The Surat Split of 1907 occurred primarily because of ideological differences between Moderates (led by Gopal Krishna Gokhale) and Extremists (led by Bal Gangadhar Tilak). The Extremists, energised by the Swadeshi Movement, had lost faith in the Moderates' policy of petitions and prayers to the British. The immediate flashpoint was the disagreement over the Presidentship of the Congress session — Tilak's supporters wanted Lala Lajpat Rai as President, while the Moderates preferred Rash Behari Ghose.

Both statements are correct. The Tamil Siddhas (Sittars) were mystic poets who emphasised direct spiritual experience and rejected ritual, idol worship, and caste distinctions; they were effectively monotheists focused on the Supreme Being. The Lingayats (Veerashaivas), founded by Basavanna in 12th-century Karnataka, were reformist in character — they rejected caste hierarchy, opposed rebirth theory (karma-based transmigration), and worshipped Shiva through the personal linga worn on the body.

Statements 1 and 2 are correct. UNESCO's Man and the Biosphere (MAB) Programme, launched in 1971, designates Biosphere Reserves worldwide through the World Network of Biosphere Reserves (WNBR). Biosphere Reserves follow a standard zonation: a strictly protected Core Zone (no human disturbance), a Buffer Zone (limited research, education, and non-disruptive activities), and a Transition/Co-operation Zone (sustainable human settlements and economic activities). Statement 3 is incorrect: India has 18 government-notified biosphere reserves. As of September 2025, 13 of these have been recognised by UNESCO under the MAB World Network of Biosphere Reserves — including the most recent, the Cold Desert Biosphere Reserve in Himachal Pradesh (admitted at the 5th World Congress of Biosphere Reserves, Hangzhou, September 2025). Five of India's 18 reserves are therefore not yet UNESCO-recognised, making Statement 3 factually wrong.

Only Statement 2 is correct. The Paris Agreement (adopted December 12, 2015, entered into force November 4, 2016) aims to hold the global average temperature increase to well below 2°C above pre-industrial levels, with efforts to limit it further to 1.5°C. Statement 1 is incorrect: the Agreement was not instantly signed by all UN member countries; it was opened for signature on April 22 (Earth Day) 2016 in New York and was signed by 175 countries initially, with later ratifications; not all 193 UN members signed simultaneously or have fully ratified it. Statement 3 is incorrect: the $100 billion per year climate finance goal was first established at COP15 (Copenhagen, 2009), not newly committed in the Paris Agreement; moreover, the Paris Agreement committed to continuing and strengthening this goal beyond 2020, but the explicit $100 billion commitment predates Paris and was not a "new" Paris pledge by developed countries acknowledging historical responsibility in those precise terms.

All three statements are correct. The Water (Prevention and Control of Pollution) Act, 1974 was India's first major environmental legislation; it established the Central Pollution Control Board (CPCB) and State Pollution Control Boards (SPCBs) as statutory authorities and set standards for discharge of effluents into water bodies. The Air (Prevention and Control of Pollution) Act, 1981 (amended 1987) extended environmental regulation to air quality; it was necessitated partly by India's obligations under the Stockholm Conference (1972) and empowered SPCBs to control air pollution from industries and vehicles. The Biological Diversity Act, 2002 implements India's obligations under the Convention on Biological Diversity (CBD, 1992), established the National Biodiversity Authority (NBA), State Biodiversity Boards, and Biodiversity Management Committees at local levels, and regulates access to India's biological resources and associated knowledge.

Statements 1 and 3 are correct. The pyramid of energy is always upright in every ecosystem because energy flows in one direction (producers → consumers) and is always lost (as heat) at each trophic level; this is a fundamental thermodynamic constraint that admits no exceptions. The pyramid of numbers is inverted in a forest ecosystem: a single large tree (one producer) provides food and habitat for tens of thousands of insects, caterpillars, and other herbivores, which in turn support fewer birds and predators. Statement 2 is incorrect: the pyramid of biomass is inverted in AQUATIC (marine) ecosystems where phytoplankton (producers) have very rapid turnover rates — the standing crop biomass of phytoplankton at any instant is less than that of the zooplankton feeding on them, because phytoplankton reproduce so rapidly that a small standing stock supports a larger consumer biomass. In terrestrial ecosystems, the biomass pyramid is typically upright (forests have large plant biomass at the base).

All three statements are correct. India's National Air Quality Index (AQI), launched by the Central Pollution Control Board (CPCB) in 2014, considers eight pollutants: PM₁₀, PM₂.₅, NO₂, SO₂, CO, ozone (O₃), ammonia (NH₃), and lead (Pb) — corresponding to the pollutants with established National Ambient Air Quality Standards (NAAQS). The AQI scale runs from 0 to 500 with six colour-coded categories: Good (0–50), Satisfactory (51–100), Moderately Polluted (101–200), Poor (201–300), Very Poor (301–400), and Severe (401–500); higher numbers always indicate worse air quality and greater health risks. The CPCB centrally administers the AQI programme through the Continuous Ambient Air Quality Monitoring System (CAAQMS) stations, supported by SPCBs at the state level, covering over 200 cities in India. PM₂.₅ and PM₁₀ are the most frequently dominant pollutants driving AQI in Indian cities.

Statement 1 is correct — Mangalyaan is the popular name for ISRO's Mars Orbiter Mission (MOM). Statement 2 is incorrect — India was the fourth space agency to reach Mars orbit, after the USA (NASA), the Soviet Union, and the European Space Agency. Statement 3 is correct — India is the only country to have successfully placed a spacecraft into Martian orbit on its very first attempt, a distinction achieved on 24 September 2014.

Both statements are incorrect. Before India, NASA, the European Space Agency, Japan, and Russia had launched similar multi-wavelength space observatories. Astrosat has a lift-off mass of approximately 1513 kg (not 2000 kg) and was launched by PSLV-C30 on 28 September 2015 into a 650 km orbit (not 1650 km) inclined at 6 degrees to the equator.

Both statements are correct. Li-Fi (Light Fidelity), invented by Professor Harald Haas of the University of Edinburgh, transmits data by rapidly modulating the intensity of LED light pulses — invisible to the human eye. Laboratory tests have demonstrated speeds exceeding 224 Gbps, far surpassing conventional Wi-Fi. Because it uses light instead of radio waves, it does not cause radio-frequency interference and offers greater security since light cannot pass through walls.

ITER, under construction in Cadarache, France, is a joint project of 35 nations (including India) to demonstrate the scientific and technological feasibility of nuclear fusion as a large-scale, carbon-free energy source. If successful, ITER will prove that more energy can be extracted from fusion than is put in (Q > 1), giving member states the technological know-how to design and build commercial fusion power plants. India's participation is managed through the Institute for Plasma Research (IPR), Ahmedabad.

GL-10 Greased Lightning is a battery-powered unmanned aerial vehicle (UAV) developed and tested by NASA Langley Research Center. It features ten electric motors — eight on a front wing and two on the tail — that tilt vertically for take-off and landing (like a helicopter) and then rotate horizontally for efficient cruise flight. The successful tethered test flights were reported in 2015, making it a "recently in news" topic for the 2016 UPSC exam.

Only Statement 2 is correct. The NDB (also called BRICS Bank) was established by the BRICS nations (Brazil, Russia, India, China, South Africa) — not APEC. Its headquarters is in Shanghai, China. It was formally established at the 6th BRICS Summit in Fortaleza, Brazil in 2014.

RCEP is an ASEAN-centred trade agreement. It was negotiated among ASEAN's 10 members and its FTA partners (China, Japan, South Korea, Australia, New Zealand). India participated in negotiations until 2019 but chose not to sign. RCEP was signed by 15 nations in November 2020 and entered into force on 1 January 2022.

Iran is not a member of the Gulf Cooperation Council (GCC). The GCC, founded in 1981, comprises six Sunni Arab states: Bahrain, Kuwait, Oman, Qatar, Saudi Arabia, and the United Arab Emirates. Iran (a Shia-majority Persian state) has historically been outside this grouping and at times in geopolitical tension with GCC members.

Only Statement 1 is correct: the third India-Africa Forum Summit was held in October 2015 in New Delhi with all 54 African Union member states participating. Statement 2 is incorrect: the IAFS was not instituted under Nehru in 1951. The first IAFS was held in 2008 in New Delhi, initiated by Prime Minister Manmohan Singh.

Statements 2 and 3 are correct. Statement 1 is incorrect: OPCW is an independent intergovernmental organisation and the implementing body of the Chemical Weapons Convention (CWC), not an EU body. OPCW does monitor the chemical industry and provides protection to states against chemical weapons — it won the Nobel Peace Prize in 2013.

Neither statement is correct. The TPP was signed by 12 countries (Australia, Brunei, Canada, Chile, Japan, Malaysia, Mexico, New Zealand, Peru, Singapore, USA, Vietnam) — it did not include all Pacific Rim countries, and India, Indonesia, and the Philippines were also excluded. It was a comprehensive trade deal covering goods, services, and IP — not just maritime security.

Satya Shodhak Samaj ("Truth-seeking Society") was founded by Jyotirao Phule in Pune in 1873. It was an anti-caste, anti-Brahminical movement that sought to assert the human dignity of lower castes and untouchables irrespective of their caste status. Phule challenged Brahmin dominance, promoted social equality, and advocated for the rights of women and lower castes. The Samaj is a landmark in the social reform history of Maharashtra and a precursor to the Dalit movement.

Rashtriya Garima Abhiyan is a national campaign launched to eradicate the practice of manual scavenging — one of the most dehumanising caste-based occupations — and to rehabilitate those engaged in it. It operates under the Prohibition of Employment as Manual Scavengers and their Rehabilitation Act, 2013. The campaign seeks to restore the dignity (garima) of manual scavengers by providing them alternative livelihoods, skill training, and social integration support.

Statements 1 and 3 are correct. The NIA was established under the National Investigation Agency Act, 2008, following the Mumbai terror attacks of 26 November 2008. The Director General of NIA is appointed by the Central Government. Statement 2 is incorrect: the NIA (Amendment) Act, 2019 extended NIA's jurisdiction to investigate offences against Indians or affecting India's interests outside India as well, removing the earlier limitation to only domestic investigations.

The merger of the People's War Group (PWG) and the Maoist Communist Centre (MCC) to form the Communist Party of India (Maoist) in September 2004 was the most significant organisational development in the LWE movement. This merger created the largest and most lethal Maoist organisation in India, exponentially increasing the threat level and geographic reach of the movement. The unified CPI (Maoist) was subsequently banned as a terrorist organisation under the UAPA in 2009.

Statements 1 and 2 are correct. The NSG was raised in 1984-1986 following the security crisis of 1984 (Operation Blue Star and PM Indira Gandhi's assassination), and operationalised under the NSG Act, 1986. NSG is indeed a two-component force: the Special Action Group (SAG) drawn from the Army, and the Special Ranger Group (SRG) drawn from Central Police Organisations and State Police. Statement 3 is incorrect: the NSG functions under the Ministry of Home Affairs (MHA), not the Ministry of Defence, as it is a paramilitary organisation used for internal security and counter-terrorism.

Statements 1 and 2 are correct. The IB is India's domestic intelligence agency under the Ministry of Home Affairs, responsible for monitoring internal threats including terrorism, espionage, and secessionist movements. RAW, established in 1968, is India's external intelligence agency and reports directly to the Prime Minister's Office through the Cabinet Secretariat. Statement 3 is incorrect: neither the IB nor RAW is established under a specific Act of Parliament — both were created through executive orders/government resolutions, without a statutory framework. The absence of enabling legislation is a frequently criticised aspect of India's intelligence architecture.

Statement 1 is incorrect: Insulin is produced by the beta cells (B cells) of the islets of Langerhans in the pancreas — not alpha cells; alpha cells (A cells) produce glucagon, which has the opposite effect of raising blood glucose by stimulating glycogenolysis in the liver. This is a very commonly tested distinction in UPSC. Statement 2 is correct: thyroxine (T4, tetraiodothyronine) is secreted by the follicular cells of the thyroid gland and is the primary regulator of basal metabolic rate, affecting heart rate, body temperature, and energy metabolism; its deficiency causes hypothyroidism (including goitre and cretinism in children). Statement 3 is correct: adrenaline (epinephrine) is secreted by the adrenal medulla (the inner part of the adrenal glands atop the kidneys) and mediates the acute stress or "fight-or-flight" response — increasing heart rate, dilating airways, mobilising glucose, and redirecting blood to muscles. Since statement 1 is incorrect and statements 2 and 3 are correct, the answer is 2 and 3 only (option B).

Optical fibres transmit light signals through the phenomenon of Total Internal Reflection (TIR), which occurs when light travels from a denser optical medium (the glass/silica core with higher refractive index) to a rarer medium (the cladding layer with slightly lower refractive index) at an angle of incidence greater than the critical angle — the light is completely reflected back into the denser medium without any loss through refraction. This allows light signals to travel thousands of kilometres through glass fibres with extremely low signal loss (attenuation), making fibre optics the backbone of modern telecommunications, internet, and cable TV infrastructure. Refraction (bending of light at interfaces) actually needs to be minimised in fibre optics; scattering causes signal attenuation and is an undesired effect; interference is used in other optical instruments like interferometers but not in fibre transmission. The concept of TIR was first described by Johannes Kepler and later formalised by Augustin-Jean Fresnel; the critical angle depends on the ratio of refractive indices of the two media. UPSC regularly tests the operating principles of modern communication technologies.

All three statements are correct. Statement 1: the resolving power of the human eye — determined by the diameter of the pupil (diffraction limit) and the spacing of photoreceptors (cones) in the fovea — allows the eye to distinguish two closely spaced points as separate rather than as a single blurred point; the minimum angle of resolution for a normal eye is approximately 1 arcminute. Statement 2: the near point (least distance of distinct vision) for a normal human eye is 25 cm — this is the closest distance at which the eye can form a sharp image by fully accommodating (contracting the ciliary muscles to increase the curvature of the eye lens); in presbyopia (age-related), the near point recedes beyond 25 cm. Statement 3: the far point of a normal emmetropic (no refractive error) eye is at optical infinity — meaning the eye can focus on parallel rays from very distant objects with the ciliary muscles fully relaxed; in myopia (short-sightedness) the far point is closer than infinity, and in hypermetropia (long-sightedness) it is behind the eye. All three accurately describe the optics of the normal human eye as taught in standard physics and physiology curricula.

All three pairs are correctly matched. Brass is an alloy of copper (65-70%) and zinc (30-35%); it is used for musical instruments, plumbing fittings, and decorative items because of its golden appearance, corrosion resistance, and acoustic properties. Bronze is an alloy of copper (typically 88%) and tin (12%); it was the defining material of the Bronze Age (c. 3300-1200 BCE), being harder than copper alone, and is still used for statues, bells, bearings, and marine hardware. German Silver (also called nickel silver or alpaca) is an alloy of copper, zinc, and nickel — despite the name it contains no actual silver; it has a silver-like appearance and is used for cutlery, musical instrument keys, jewellery, and decorative items. A common UPSC trick is to test whether candidates know that German Silver contains no silver — the name refers only to its colour and lustre. Other important alloys include stainless steel (iron-chromium-nickel), solder (tin-lead or tin-silver), and duralumin (aluminium-copper-magnesium-manganese).

All three — Agni-V, BrahMos, and Prithvi — are surface-to-surface missiles (SSMs), meaning they are launched from a ground platform and designed to strike ground-based targets. Agni-V is India's ICBM-class strategic ballistic missile with a range exceeding 5,000 km, capable of reaching targets across China and parts of Europe, and is a canisterised, road-mobile solid-fuel missile. BrahMos is a supersonic cruise missile (Mach 2.8-3.5) developed jointly by India (DRDO) and Russia (NPO Mashinostroyeniya) through BrahMos Aerospace, named after the Brahmaputra and Moskva rivers; while BrahMos has multiple launch platforms including ships, submarines, and aircraft, it is fundamentally a surface-to-surface precision strike weapon when ground-launched. Prithvi is India's tactical short-range surface-to-surface ballistic missile developed under IGMDP; different variants (Prithvi-I, II, III) have ranges of 150-350 km and are deployed with the Indian Army and Air Force. UPSC frequently asks about missile classifications — surface-to-surface, surface-to-air, air-to-surface — and their ranges to test knowledge of India's strategic capabilities.

INS Arihant (SSBN S2) is India's first indigenously built nuclear-powered ballistic missile submarine (SSBN — Ship Submersible Ballistic Nuclear), secretly developed under the Advanced Technology Vessel (ATV) project at the Ship Building Centre (SBC) in Visakhapatnam; it was launched on 26 July 2009 and commissioned into the Indian Navy in August 2016 by Prime Minister Narendra Modi. INS Arihant carries K-15 Sagarika submarine-launched ballistic missiles (SLBM, range ~750 km) and K-4 missiles (range ~3,500 km), completing India's nuclear triad — the ability to deliver nuclear weapons from land-based missiles, aircraft, and submarines — which provides a more robust and survivable second-strike capability. Option A is incorrect — an attack submarine (SSN) is a nuclear-powered submarine designed to hunt and destroy other submarines and surface ships but does not carry ballistic missiles; Arihant is an SSBN (ballistic missile submarine), not an SSN. Option C is incorrect — India's first indigenously built aircraft carrier is INS Vikrant (commissioned 2022), not Arihant. UPSC tests INS Arihant as it completed India's nuclear triad — a significant strategic and security milestone.

All three statements are correct. Under Section 14 of the Disaster Management Act, 2005, every State Government is required to establish a State Disaster Management Authority (SDMA). The Chief Minister is the ex-officio Chairperson of the SDMA (Section 14(2)). At the district level, the District Disaster Management Authority (DDMA) is chaired by the District Collector/District Magistrate, with the elected Chairperson of the Zila Parishad as co-Chairperson (Section 25).

Statements 1 and 2 are correct. India is classified into four seismic zones — Zone II (least active), Zone III (moderate), Zone IV (high), and Zone V (very high/most seismically active) — by the Bureau of Indian Standards (BIS). Zone V covers high-risk areas including the entire northeast India, Uttarakhand and Himachal Pradesh (Himalayan states), parts of Jammu and Kashmir, the Andaman and Nicobar Islands, and Rann of Kutch in Gujarat. Statement 3 is incorrect: the entire Indian subcontinent is not in Zone V. The southern Deccan plateau and most of the peninsular region fall in Zone II and Zone III, with relatively lower seismic risk.