An organic compound A has molecular formula `C_7H_9N` and it forms a clear solution when dissolved in aqueous `KOH` solution of benzene sulphonyl chloride. A on treatment with `NaNO_2` and `HCl` at `0^@` C and then with 2-naphthol form an intensely coloured compound. Aslo A on treatment with `CH_3COCl` followed by electrophilic sustitution yields a single product. identify. A