Type of elimination reaction in which least substituted alkene is major product known as Hofmann's elimination. Such reaction occur in following conditions : (X) when base is bulky (Y) when leaving group is very poor such as fluoride, ammonium group `(-overset(oplus)NR_(3))` etc.
(Z) when alkyl halide contain one or more double bonds.
What is the major product of the following reaction?
`H_(3)C-underset(Br)underset(|)CH-overset(CH_(3))overset(|)CH-overset(CH_(3))overset(|)underset(CH_(3))underset(|)C-CH_(3)overset(Me_(3)CO^(Θ)K^(oplus))rarr`

Options

A. `H_(2)C=CH-overset(CH_(3))overset(|)CH-overset(CH_(3))overset(|)underset(CH_(3))underset(|)C-CH_(3)`
B. `H_(2)C-CH=overset(CH_(3))overset(|)C-overset(CH_(3))overset(|)underset(CH_(3))underset(|)C-CH_(3)`
C. `H_(2)C-H_(2)C=overset(CH_(2))overset(|)C-overset(CH_(3))overset(|)underset(CH_(3))underset(|)C-CH_(3)`
D. None of these

Answer

A