Among the following, the suitable reagent for Wurtz reaction is

The suitable reagent for Wurtz reaction is $\mathrm{Na} /$ ether. An ethereal solution of an alkyl halide is treated with sodium to produce higher alkanes. This reaction involves the formation of new $\mathrm{C}-$$\mathrm{C}$$bond. e.g.$\underset{$\text{ Ethyl bromide }$}{$\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{Br}+$2 $\mathrm{Na}$}+$\mathrm{CH}_3$$\mathrm{Br}$\xrightarrow{$\text{ Ether }$} \underset{$\text{ Propane }$}{\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{CH}_3}