An aromatic compound [A] on heating with aqueous ammonia forms compound [B]. Upon heating with and…

An aromatic compound [A] on heating with aqueous ammonia forms compound [B]. Upon heating with $\text{Br}_2$ and $\text{KOH}$, compound [B] forms compound [C] which has the molecular formula $\text{C}_6\text{H}_7\text{N}$. Identify compounds [A], [B] and [C]. Name the reaction involved in conversion of compound [B] to compound [C].