Which form of nitrogenlous fertiliser will be preferred for paddy and potato?

Answer: Option B

An ammonical form of nitrogenous fertilizer will be preferred for paddy and potatoes.
Ammonium sulphate [(NH₄)₂SO₄]: This is a nitrogenous fertilizer that is used for raising the production level of crops like paddy, potato, etc.
In this fertilizer, there is nearly 25% ammonia which is transformed into nitrate by the denitrifying bacteria present in the alkaline soil.