The major product from the reaction of `3`-bromo-`2,3`-dimethylpentane with al. `KOH` is

Options

A. `(CH_(3))_(2)C=C(CH_(3))CH_(2)CH_(3)`
B. cis-`CH_(3)CH=C(CH_(3))CH(CH_(3))_(2)`
C. trans-`CH_(3)CH=C(CH_(3))CH(CH_(3))_(2)`
D. `H_(2)C=C(CH_(2)CH_(3))CH(CH_(3))_(2)`

Answer

A

Explanation

In accordance with Sayzeff's rule, the more substituted alkene is the major product. The order of decreasing yield is `1 gt 3 gt 2 gt 4`.