$I.$ $C H_{3} C H=C H C H_{3}$ (મુખ્ય નીપજ )
$II.$ $C H_{2}=C H C H_{2} C H_{3}$ (ગૌણ નીપજ )
$[Figure]$ $\xrightarrow[{S_N2}]{{KOH}}$