Which one of the following is not a fertilizer?

A. Ammonium sulphate

B. Calcium sulphate

C. Calcium ammonium nitrate

D. Potassium nitrate

Answer: Option B

Solution(By Examveda Team)

Calcium sulfate is a common laboratory and industrial chemical. In the form of -anhydrite (the nearly anhydrous form), it is used as a desiccant. It is also used as a coagulant in products like tofu. The main sources of calcium sulfate are naturally occurring gypsum and anhydrite which occur at many locations worldwide as evaporites.