The correct option is D Complex fertilisers usually have a combination of nitrogen, phosphate, and potash.
The fertiliser industry has expanded to a lot of Indian states in the past few decades as a result of the green revolution. The country does not have any reserves of commercially usable potash or potassium compounds in any form. A large chunk of potash is imported to our country. The fertiliser industries produce nitrogenous fertilisers, phosphatic fertilisers, as well as Diammonium phosphate. Urea is one of the most important nitrogenous fertilisers.