A,B,C are with molecular formula $C_8{H}_{11}N$ three isomeric amines. A and B react with $CHC{l}_3+$KOH  but not C. C reacts with $NaN{O}_2+HCl$ to give yellow oily liquid.A on treatment with (1) acetic anhydride (2) Br2 and acetic acid (3) aqueous NaOH , heat produced compound D (C₈H₁₀NBr)