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(B) The reaction of $p-$chlorotoluene with $KNH_2$ in liquid $NH_3$ proceeds via the $benzyne$ mechanism (elimination-addition reaction). In $p-$chlor

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$m-$toluidine

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(B) The reaction of $p-$chlorotoluene with $KNH_2$ in liquid $NH_3$ proceeds via the $benzyne$ mechanism (elimination-addition reaction). In $p-$chlorotoluene,the $Cl$ atom is at the $para$ position relative to the $CH_3$ group. When $KNH_2$ removes a proton from the $ortho$ position relative to the $Cl$ atom,a $benzyne$ intermediate is formed. Nucleophilic attack by $NH_2^-$ on this $benzyne$ intermediate can occur at either the $ortho$ or $meta$ position relative to the $CH_3$ group. Due to the inductive effect of the $CH_3$ group,the $meta$ position is more favored for nucleophilic attack,leading to a mixture of $m-$toluidine and $p-$toluidine,with $m-$toluidine being the major product.

The major product obtained from the reaction of $p-$chlorotoluene with $KNH_2$ in liquid $NH_3$ is ..........

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