
$Cl_2/ AlCl_3 \Rightarrow$ Electrophilc aromatic substitution.
According to Baker-Nathan effect, hyperconjugation dominates over inductive effect. Hence ortho-position of methyl group has more $e^-$ density for $EAS$



${C_2}{H_5}Br\xrightarrow{{KCN}}A\xrightarrow{{Hydrolysis}}B$