The correct answer is A. Ammonium nitrate.
Ammonium nitrate is a chemical compound with the formula NH4NO3. It is a white, water-soluble solid that is used as a fertilizer, explosive, and propellant. Ammonium nitrate is produced by the reaction of ammonia and nitric acid. It is a major component of ammonium nitrate/fuel oil (ANFO) explosives, and is also used in some types of rocket propellants.
Urea is a chemical compound with the formula CO(NH2)2. It is a white, odorless, crystalline solid that is used as a fertilizer, animal feed additive, and in the manufacture of plastics and other chemicals. Urea is produced by the reaction of ammonia and carbon dioxide.
Ammonium sulfate is a chemical compound with the formula (NH4)2SO4. It is a white, odorless, crystalline solid that is used as a fertilizer, industrial chemical, and in the manufacture of explosives. Ammonium sulfate is produced by the reaction of ammonia and sulfuric acid.
Nitro-lime is a mixture of calcium nitrate and calcium oxide. It is a white, powdery solid that is used as a fertilizer, soil amendment, and in the manufacture of explosives. Nitro-lime is produced by the reaction of calcium nitrate and calcium hydroxide.
Ammonium nitrate is the most extensively used nitrogenous fertilizer because it is relatively inexpensive, easy to produce, and has a high nitrogen content. It is also a good source of sulfur, which is an essential nutrient for plants.