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The major product of the following react...

The major product of the following reaction is:

A

B

C

D

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The correct Answer is:
A

`PhS^(-)` is a strong nucleophile and dimethyl formamide (DMF) is a highly polar aprotic solvent. Condition indicates that nucleophilic substitution (`S_N2`) takes place at 2° benzylic place, stereochemically, it involves inversion of configuration.
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