Correct Answer - A
Alkyl halides undergo nucleophilic substitution more readily than aryl halides. Hence substitution occurs more readily in the side chain rather than in the ring. `PhS^(-)` is a strong nucleophile and dimethyl formamide (DMF) is a higher aprotic solvent conditions indicate that nucleophilic substitution `(S_(N^(2)))` takes place at `2^(@)` benzylic place, stero chemically it involves inversion of configuration
