निम्न अभिक्रियाओं में A,B तथा C की संरचना दीजिए-

(ii) `C_(6)H_(5)N_(2)CI overset(CuCN)(to) A overset(H_(2)O // H^(+))(to) B overset(NH_(3))underset(Delta)(to)C`
`(iii) CH_(3)CH_(2)Br overset(KCN)(to) A overset(LiAH_(4))(to)B overset(HNO_(2))underset(0^(@)C)(to) C`
`(iv) C_(6)H_(5)NO_(2) overset(Fe //HCI)(to) A overset(NaNO_(2)+HCI)underset(273k)(to) B overset(H_(2) O // H^(+))underset(Delta)(to)C`
`(v) CH_(3) COOH overset(NH_(3))underset(Delta)(to) A overset(NaOBr)(to) B overset(NaNO_(2) // HCI)(to) C`
`(vi) C_(6) H_(5)NO_(2) overset(Fe // HCI) (to) A overset( HNO_(2))underset(273 K)(to) B overset(C_(6)H_(5)OH)(to)C`