The white saline surface of Rann of Kachchh is a result of which process?

Correct answer: Evaporation and salt deposition after seasonal waterlogging

The direct answer is B. The Rann of Kachchh is a low-lying saline region that experiences seasonal waterlogging. During the wet season, water spreads over parts of the surface. In the hot, dry season, strong evaporation removes the water, but dissolved salts remain behind and crystallise as a white layer. Step by step: seasonal water covers the plain; evaporation dries the water; salt is left and deposited; the surface appears white and saline. Option A is wrong because permanent snow is not responsible in this hot lowland. Option B is correct because it gives both essential processes: evaporation and salt deposition after seasonal waterlogging. Option C is wrong because basaltic lava would produce volcanic rock, not a seasonal salt crust. Option D is wrong because coral reefs are marine biological structures and do not explain the inland saline surface. Exam cue: Rann means salt-covered seasonal plain in this context.