Given the structures of A, B and C in the following reactions :
(i) `CH_(3) Br overset (KCN) toAoverset(LiAlH_(4))to B overset(HNO_(2))underset(273K)toC`
(ii) `CH_(3) COOH overset (NH_(3))undersetDelta toAoverset(Br_(2)+KOH)to B overset(CHCl_(3)+NaOH)toC`

Explanation

`underset("Methyl bromide")(CH_(3)Br) overset(KCN)(rarr) underset(("Methyl cyanide"),([A]))(CH_(3)CN) overset(LiAlH_(4))(rarr) underset(("Ethyl amine"),([B]))(CH_(3)CH_(2)NH_(2)) underset(273 K)overset(HNO_(2))(rarr) underset(("Ethyl alcohol"),([C]))(CH_(3)CH_(2)OH)`