A) \[R-CH=N-N{{H}_{2}}\]
B) \[R-C\equiv \equiv N\]
C) \[R-\underset{\begin{smallmatrix} || \\ O \end{smallmatrix}}{\mathop{C}}\,-N{{H}_{2}}\]
D) \[R-CH=NH\]
Correct Answer: A
Solution :
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