Q. $C _{6} H _{5} NH _{2} \ce{->[{ NaNO _{2} / HCl }][{0^{\circ}-5^{\circ} C }]} C _{6} H _{5} \overset{+}{N _{2}} Cl\ce{->[{ KCN }][{ CuSO _{4}}]} $ $'A'$ product $A$ is :
Rajasthan PMTRajasthan PMT 2000
Solution: