Give the strutures of (A), (B) and (C ) in the following reactions :
i. `
ii. `C_(6)H_(5)N_(2)CI overset(CuCN)rarr (A) overset(H_(2)O //H^(+))rarr (B) overset(NH_(3))underset(Delta)rarr (C)`
iii. `CH_(3)CH_(2)Br overset(KCN)rarr (A) overset(LiAIH_(4))rarr (B) overset(HNO_(2))underset(0^(@)C)rarr (C)`
iv. `C_(6)H_(5)NO_(2) overset(Fe//HCI)rarr (A) overset(NaNO_(2)+HCI)underset(273K)rarr (B) overset(H_(2)O //H^(+))underset(Delta)rarr (C)`
v. `CH_(3)COOH overset(NH_(3))underset(Delta)rarr (A) overset(NaOBr)rarr (B) overset(NaNO_(2) //HCI)rarr (C)`
vi. `C_(6)H_(5)NO_(2) overset(Fe //HCI)rarr (A) overset(HNO_(2))underset(273K)rarr (B) overset(C_(6)H_(5)OH)rarr (C)`
