Which fertilizer/s is/are basic in nature?

Answer: Option C

CAN is calcium ammonium nitrate also known as nitro-lime stone or nitrochalk, widely used as inorganic nitrogenous fertilizer. It is not basic.

SSP is single super phosphate and is the most popular phosphatic fertilizer after DAP. It contains 3 major plant nutrients i.e. Phosphorus, Sulphur, and calcium. It is not basic.

Sodium nitrate (NaNO₃) is also known as Chile saltpeter. It is a white deliquescent solid very soluble in water and is a readily available source of the nitrate anion. It is used in fertilizers, where it supplies the water-soluble form of nitrogen. It is basic but it does not alter the pH of the soil.