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(B) racemic mixture is formed when an achiral reactant produces a pair of enantiomers in equal amounts. In the reaction of $1,2$-dimethylcyclopentene

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(B) racemic mixture is formed when an achiral reactant produces a pair of enantiomers in equal amounts. In the reaction of $1,2$-dimethylcyclopentene with $Br_2/CCl_4$,the addition of bromine occurs via an anti-addition mechanism. Since the starting material $1,2$-dimethylcyclopentene is achiral,the anti-addition of $Br_2$ across the double bond creates two new chiral centers,resulting in a pair of enantiomers (a racemic mixture).

Product of which of the following reactions is a racemic mixture?

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