3-Chlorotoluene (1-chloro-3-methylbenzene) is treated with $\mathrm{NaNH}{}_2$ in liquid $\mathrm{NH}{}_3$. The number of different methylaniline (toluidine) isomers formed through benzyne intermediates is

Number ring carbons with $\mathrm{Cl}$ at C-1 and $\mathrm{CH}{}_3$ at C-3. Hydrogens ortho to $\mathrm{Cl}$ are at C-2 and C-6, giving two benzynes. The C1-C2 benzyne gives NH2 at C-1 (meta to $\mathrm{CH}{}_3$) or at C-2 (ortho). The C1-C6 benzyne gives NH2 at C-1 (meta) or at C-6 (para to $\mathrm{CH}{}_3$). So the o-, m- and p-toluidines are all formed: 3.