\(\left. {\begin{array}{*{20}{c}}
{C{H_3}COC{H_3}\xrightarrow{{NaOH/{I_2}}}CH{I_3}} \\
{{C_2}{H_5}OH\xrightarrow{{NaOH/{I_2}}}CH{I_3}} \\
{C{H_3} - \mathop {\mathop {CH}\limits_{|\,\,\,\,\,} }\limits_{OH} - C{H_3}\xrightarrow{{NaOH/{I_2}}}CH{I_3}}
\end{array}} \right\}yellow\,ppt\)
$(I)$ Benzylchloride
$(II)$ $p-$ Methoxy benzyl chloride
$(III)$ $p-$ Nitro benzyl chloride
${C_2}{H_5}I\xrightarrow{{Alco.\,\,KOH}}X\xrightarrow{{B{r_2}}}Y\xrightarrow{{KCN}}Z$