BPSC 66th Prelims 27 Dec 2020 Paper

Concept:Urea is an organic compound with the chemical formula $CO(NH_{2})_{2}$, which contains four elements: carbon, hydrogen, nitrogen, and oxygen.Explanation:The molecular formula of urea is $CO(NH_{2})_{2}$.It has one carbon (C), one oxygen (O), two nitrogen (N), and four hydrogen (H) atoms.Thus, the elements present are carbon, hydrogen, nitrogen, and oxygen.Other given options miss at least one of these elements.Answer:D. C, H, N, O