Urea contains . . . . . . . . nitrogen

Answer: Option C

Urea contains 46% nitrogen.
Urea, also known as carbamide, is an organic compound with chemical formula CO(NH₂)₂. This amide has two amino groups (-NH₂) joined by a carbonyl functional group.
Urea is a white crystalline solid containing 46 percent nitrogen as an animal feed additive and fertilizer.
It is a colorless, odorless solid, highly soluble in water, and practically non-toxic.