Chemical formula of biuret is
A
NH<sub>2</sub>.CO.NH<sub>2</sub>
B
NH<sub>3</sub>.COO.NH<sub>3</sub>
C
NH<sub>2</sub>CONHCONH<sub>2</sub>
D
NH<sub>4</sub>COONH<sub>2</sub>
Correct Answer: NH<sub>2</sub>CONHCONH<sub>2</sub>