UPSC Current Affairs Quiz, 8 November 2026

Explanation

Statement 1 is correct. The CPCB was constituted under Section 3 of the Water (Prevention and Control of Pollution) Act, 1974. The Air (Prevention and Control of Pollution) Act, 1981 did not create a new body — it extended the mandate of the already-existing CPCB to cover air pollution as well, adding air-quality functions under Section 16 of the Air Act. This is a commonly confused point: the Air Act broadened CPCB's scope but is not its founding statute. Statement 2 is correct. The CPCB's AQI scale runs from 0–500 and is divided into six bands. The 'very poor' band spans values from 301 to 400, and 'severe' covers 401 to 500. An AQI at or above 401 triggers the most stringent pollution-management responses under frameworks such as GRAP (Graded Response Action Plan). Statement 3 is incorrect. PM2.5 refers to fine particulate matter with an aerodynamic diameter of 2.5 micrometres or less — not coarse particles. It is precisely because PM2.5 particles are so fine that they penetrate deep into the lungs and even enter the bloodstream, making them far more hazardous than coarser PM10 particles. PM2.5 is the predominant pollutant of concern in Delhi's urban air quality, particularly during winter and firecracker-related episodes.

Explanation

India's foreign exchange reserves have four components: foreign currency assets (the largest share), gold reserves, Special Drawing Rights (SDRs) allocated by the IMF, and India's reserve tranche position with the IMF. Statement 1 is correct: foreign currency assets are held in multiple currencies (euro, pound, yen, etc.), so their reported dollar value fluctuates with exchange rate movements even when no actual dollar transactions occur — a decline in reported value does not necessarily equal actual dollar sales. Statement 2 is correct: SDRs and the reserve tranche position with the IMF are indeed separate, distinct components of India's overall forex reserves alongside foreign currency assets and gold — this is the standard four-part composition framework for any country's reserves as defined by the IMF. Statement 3 is incorrect: when the RBI sells dollars in the market to defend the rupee, it draws down its own stock of foreign currency reserves — this reduces, not increases, the reserve level. The purpose is to absorb excess rupee-selling pressure, but the cost is a fall in the reserve buffer.

Explanation

All three pairs are correctly matched. El Niño is characterised by anomalously warm sea surface temperatures in the central and eastern tropical Pacific; this warming weakens the Walker Circulation, which typically suppresses convection over the Indian Ocean and reduces monsoon rainfall over the Indian subcontinent — a well-established teleconnection documented by the India Meteorological Department and global climate science. The delayed dairy flush season in India is a downstream agricultural consequence: El Niño-driven temperature rise and irregular rainfall shrink fodder availability and intensify cattle water stress, which suppresses milk yields and shifts the peak supply period later in the season. ENSO teleconnection is the precise scientific concept describing how the El Niño-Southern Oscillation (ENSO) in the Pacific remotely drives weather anomalies — rainfall deficits, heat waves, dry spells — across South Asia, East Africa, and other distant regions through atmospheric circulation bridges. Each pair correctly links the phenomenon to its established mechanism.

Explanation

Statement 1 is incorrect. Phosphate-solubilising and potassium-mobilising microbes do not synthesise nutrients from scratch; their documented mode of action is to release nutrients that are already bound in an unavailable form in the soil — a process of mobilisation or solubilisation, not de-novo synthesis. This distinction is fundamental to understanding how biofertilisers differ from synthetic fertilisers. Statement 2 is correct. Under drought stress, plants produce elevated ethylene, which triggers premature leaf senescence and curtails photosynthesis during the critical grain-filling period. ACC-deaminase is an enzyme produced by certain rhizobacteria that degrades the ethylene precursor ACC (1-aminocyclopropane-1-carboxylic acid), thereby lowering ethylene levels and prolonging canopy photosynthetic activity. Statement 3 is correct. A well-established mechanism by which biostimulants — including seaweed-derived and botanical extracts — confer abiotic stress tolerance is by upregulating the plant's own antioxidant defence enzymes (superoxide dismutase, catalase, peroxidase), which scavenge the reactive oxygen species (ROS) burst triggered by heat and drought. Accumulation of compatible solutes such as proline and glycine betaine further stabilises cell membranes under water deficit. Both mechanisms are part of the documented biochemical rationale for using biostimulants in stress-prone Rabi seasons.

Explanation

Industrial cluster concentration in global supply chains is driven by several reinforcing factors. Statement 1 is correct: low capital intensity means firms do not need expensive machinery, so the cluster's advantage rests on abundant, low-cost labour rather than on technology that advanced rivals can easily replicate — this is a genuine structural cost advantage. Statement 2 is also correct: recurring domestic demand anchored in cultural events (such as festivals and national holidays) generates multiple demand cycles within a year, stabilising revenues for producers and reinforcing the cluster's scale economies. Statement 3 is incorrect in its conclusion: regulatory arbitrage — operating under comparatively lax safety or environmental regulations — acts as a structural cost *advantage* for the cluster, not a disadvantage. It lowers compliance costs relative to producers in jurisdictions with stricter standards, enabling the cluster to price more competitively internationally. The fact that it raises safety risks is a social concern, but from a purely cost-competitiveness standpoint it is a factor that *reduces* the cluster's costs, not raises them. This is a standard concept in the economics of industrial location: regions with lighter regulatory burdens attract labour-intensive, hazardous-process industries because the cost of regulation is effectively subsidised by lower enforcement, conferring a price edge over Western competitors.