Write structures of all the alkenes which on hydrogenation give 2-methylbutane.

Explanation

(i) `CH_(3)-underset(CH_(3))underset(|)CH-CH=CH_(2)`
(ii) `CH_(2)= overset(CH_(3))overset(|)C-CH_(2)CH_(3)`
(iii) `CH_(3)-underset(CH_(3))underset(|)C= CHCH_(3)`