a
\(\text{C}{{\text{H}}_{\text{3}}}\text{C}{{\text{H}}_{\text{2}}}\text{C}{{\text{H}}_{\text{2}}}\text{Cl }\,\text{+}\) \(KOH\) \(\underset{{}}{\mathop{\xrightarrow{{}}}}\,\text{ }\) \(\text{C}{{\text{H}}_{\text{3}}}\text{C}{{\text{H}}_{\text{2}}}\text{-}\,\,\text{CH}\) \(\text{= C}{{\text{H}}_{\text{2}}}\text{ + KCl + }{{\text{H}}_{\text{2}}}\text{O}\)