Give the structures of $A, B$ and $C$ in the following reactions: (i) $\mathrm{CH}_3\mathrm{Br} \xrightarrow{\mathrm{KCN}} A \xrightarrow{\mathrm{LiAlH}_4} B \xrightarrow{\mathrm{HNO}_2} C$ (ii) $\mathrm{CH}_3\mathrm{COOH} \xrightarrow{\mathrm{NH}_3} A \xrightarrow{\mathrm{Br}_2+\mathrm{KOH}} B$ $\xrightarrow{\mathrm{CHCl}_3+\mathrm{NaOH}} C$ OR How will you convert the following? (i) Nitrobenzene into aniline. (ii) Ethanoic acid into methanamine. (iii) Aniline into N-phenylethanamide. (Write the chemical equations involved.)