Which one among the following industries is the maximum consumer of water in India?

The correct answer is D) Thermal power. Thermal power plants are the largest industrial water users in India because they need huge volumes of water for condenser cooling and steam generation. Most of that is cooling water, which is drawn from rivers, reservoirs and canals and returned at a higher temperature, so the withdrawal figures are very large.

• A) Engineering: Water use is modest, mainly for processing, testing and cooling of machines, so it is far below power generation in total.
• B) Paper and pulp: This is very water-intensive per tonne of product, which is why it is a favourite trap. But its total national volume is much smaller than that of thermal power.
• C) Textiles: Dyeing and wet processing generate heavy effluent, but the sector's aggregate withdrawal is well below that of power plants.

The core concept is the difference between intensity (water per unit of output) and aggregate demand (total water used by the sector). This links to the water-energy nexus, a recurring Mains theme on water security and energy planning. Since the mid-2010s, MoEFCC norms have pushed new plants towards closed-cycle cooling and tighter water-use limits, so the picture is improving, though the question's premise still holds.

Trap: choosing paper and pulp because it is the most water-hungry per tonne, and forgetting that the question asks about total consumption.