The largest amount of fresh water on our planet is in

The correct answer is C, continental and mountain glaciers (permanent ice). Glaciers and ice caps hold roughly 68.7 per cent of the earth's freshwater, which is the largest single store. Groundwater is a distant second at about 30 per cent, and that figure is mostly why aspirants wrongly choose it.

• A) Rivers: Wrong. Rivers hold a negligible fraction of total freshwater, though they carry the largest share of water we actually use and renew.
• B) Lakes and streams: Wrong. The option is printed as 'Lack'. Lakes and streams together form a very small share of freshwater stock, well below groundwater and ice.
• D) Underground water: Wrong as the largest store. It is the largest liquid freshwater reservoir, but ice holds more than twice as much.

The core concept is the distinction between the total stock of freshwater and the accessible, renewable supply. This links directly to Mains GS-1 (geography of water resources) and GS-3 (water security), especially the dependence of the Indus and Ganga systems on Himalayan glacier melt.

Trap: Aspirants pick underground water because it is the biggest source humans can actually tap. The question asks about the total stock, and ice wins that.