# Arrange the following alkenes in increasing order of their enthalphy of hydrogenation

$\begin{array}{1 1}a)\;111 < 1V < 11 < 1\\b)\;111 < 1V <1 < 11\\c)\;1 < 11 < 111 < 1V\\d)\;1 < 11 < 1V <111\end{array}$

Structure 111 ,1 has exo double bonds, but 111 has trans form which has lowest enthalphy of hydrogenation and has greater stability
Hence (a) is the correct answer.