Treatment of compound O with $\mathrm{KMnO}_4 / \mathrm{H}^{+}$ gave $P$, which on heating with ammo

Question

Treatment of compound O with $\mathrm{KMnO}_4 / \mathrm{H}^{+}$ gave $P$, which on heating with ammonia gave $Q$. The compound $Q$ on treatment with $\mathrm{Br}_2 / \mathrm{NaOH}$ produced $R$. On strong heating, $Q$ gave $S$, which on further treatment with ethyl 2-bromopropanoate in the presence of KOH followed by acidification, gave a compound $T$.

Professor PC Thomas Classes · Answer

See detailed solution for explanation.