Which reaction conditions (reagents) are suitable for the above reaction?

B r_{2} / C C l_{4}

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S O B r_{2}

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H B r / c o n c H_{2} S O_{4}

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P B r_{3}

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Solution

The correct option is D $P B r_{3}$
Mechanism followed is $S_{N} 2$ . So the Catalyst should be strong nucleophile and polar-protic solvent like $P {B r}_{3}$ .

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