Q.
PARAGRAPH 2
Treatment of compound $O$ with $KMnO _{4} / H ^{+}$gave $P$, which on heating with ammonia gave $Q$. The compound $Q$ on treatment with $Br _{2} / NaOH$ 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 $T$.
The compound $R$ is
JEE AdvancedJEE Advanced 2016
Solution:
Correct answer is (a)