Identify compound A, B and C in the following sequence of reactions.
i. `C_(6)H_(5)NO_(2)overset(Fe//HCl)rarrAoverset(HNO_(2))underset(273K)rarr Boverset(H_(2)O)rarr C`
ii. `C_(6)H_(5)N_(2)Cloverset(CucN)rarrAoverset(H_(2)O //H^(+))rarrBoverset(NH_(3))rarrC`

Explanation

ii.`underset("chloride)")underset("(Benzenediazonium")(C_(6)H_(5)N_(2)Cl)overset(CuCN)rarrunderset("(A)")underset("(Cyanobenzene)")(C_(6)H_(5)CN)overset(H_(2)O //H^(+))rarrunderset("(B)")underset("(Benzoic acid)")(C_(6)H_(5)COOH)overset(NH_(3)//Delta)rarrunderset("(C)")underset("(Benzamide)")(C_(6)H_(5)CONH_(2))`