The correct options are
A Aqueous solutions of ammonium nitrate
B Aqueous solutions of ammonia
C Urea
D Anhydrous ammonia
Liquid fertilizer is inorganic substance produced industrially and introduced into the soil in a liquid state. Liquid fertilizers include nitrogenous fertilizers,, anhydrous liquid ammonia, aqueous ammonia, ammoniates, concentrated solutions of ammonium nitrate and urea, and complex fertilizers containing two or three basic plant food elements(nitrogen, phosphorous, and potassium) in various proportions.