Correct option(s) for the following sequence of reactions is(are)

1. $\mathbf{Q}={\mathrm{KNO}}_2, \mathbf{W}={\mathrm{LiAlH}}_4$
2. $\mathbf{R}=$benzenamine, $\mathbf{V}=\mathrm{KCN}$
3. $\mathbf{Q}={\mathrm{AgNO}}_2, \mathbf{R}=$ phenylmethanamine
4. $\mathbf{W}={\mathrm{LiAlH}}_4, \mathbf{V}=\mathrm{AgCN}$

Asked in: JEE Advanced 2021 (Paper 2)

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