Difficult
Addition of $Br_2$ to $cis-2-butene$ yields ...........
- A$A$ racemic mixture of $2,3-dibromobutane$
- B$A$ meso form of $2,3-dibromobutane$
- C$A$ dextro form of $2,3-dibromobutane$
- D$A$ levo form of $2,3-dibromobutane$
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