Consider the following reaction

The product formed in the reaction is

Options

A.
B. `CH_(3)CH(Br)underset(CH_(3))underset(|)CHCHBr_(2)`
C.
D. an equimolar mixture of (1) and (3)

Answer

A

Explanation

Dibromocarbene `( :CBr_(2))` leads to syn stereospecific addition.
If the `R` groups of the alkene are cis, they will be cis in the product. If the `R` groups are intially trans, they will be trans in the product.