There is ample amount of minerals of rock phosphate and gypsum but lack of coal resources in Rajasthan. The profitable one for the state to obtain chemical fertiliser is

A. Import coal from the other state of lndia.

B. Import electricity from the other state of India.

C. Export rock phosphate and Gypsum to other states of India.

D. Build purification plant of rock phosphate and Gypsum in Rajasthan.

Answer: Option D