equilibrium is backward. \(\therefore\) \(MeO^{\circleddash}\) will attack as a nucleophile

$C{H_3}C \equiv \,CC{H_3}\,\xrightarrow[{{\text{heat}}}]{{NaN{H_2}/{\text{inert solvent}}}}P$
$\mathrm{C}\mathrm{H}_{3} -\mathrm{C} \equiv \mathrm{CH} \xrightarrow[873\;K]{\text { red hot iron tube}} \mathrm{A}$
નીપજ $A$માં હાજર સિગ્મા$(\sigma)$ બંધની સંખ્યા........
