One per cent composition of an organic compound $A$ is, carbon : $85.71 \%$ and hydrogen $14.29 \%$. Its vapour density is $14$ . Consider the following reaction sequence \(A {\overset{Cl_2/H_2O}{\longrightarrow}} B \underset{(2)H_3O^+}{\overset{(1)KCN/EtOH}{\longrightarrow}}C\)