b
\((b)\) \(\underset{Alkyhalide}{\mathop{R-\,C{{H}_{2}}-C{{H}_{2}}-X}}\,\xrightarrow[reaction]{Addition}\) Not shown by alkyl halide (saturated compound)

\(\underset{Alkyhalide}{\mathop{R-\,C{{H}_{2}}-C{{H}_{2}}-X}}\,\xrightarrow[Alc.KOH]{Dehydroha\log enation}\) \(\underset{Alkene}{\mathop{R-\,CH=C{{H}_{2}}+HX}}\)

\(\underset{Alkyhalide}{\mathop{R-\,C{{H}_{2}}-C{{H}_{2}}-X}}\,\xrightarrow[Alc.KOH]{E\lim ination}\) \(\underset{Alkene}{\mathop{R-\,CH=C{{H}_{2}}+HX}}\)

\(\underset{Alkyhalide}{\mathop{R-\,C{{H}_{2}}-C{{H}_{2}}-X}}\,\xrightarrow[substitution]{Aq.\,KOH}\)  \(\underset{Alcohol}{\mathop{R-\,C{{H}_{2}}-C{{H}_{2}}-OH+HX}}\,\)