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Identify 'Z' in the sequence C6H5NH2un...

Identify 'Z' in the sequence
`C_6H_5NH_2underset(273K)overset(NaNO_2+HCl)to X overset(CuCN)to Yunderset("Boil")overset(H^(+)//H_2O)toZ`

A

`C_6H_5CN`

B

`C_6H_5CONH_2`

C

`C_6H_5COOH`

D

`C_6H_5CH_2NH_2`

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