Gypsum is an important amendment for problem of alkaline soils widely occurs in the state of

Answer: Option B

Gypsum is an important amendment to the problem of alkaline soils widely occurring in the state of Rajasthan.
Gypsum is a soft sulphate mineral composed of calcium dehydrate. It is widely mined and is used as a fertilizer and as the main constituent in many forms of plaster, blackboard, or sidewalk chalk. Gypsum is a common mineral, with thick and extensive sedimentary rocks.