In the reaction of p-chlorotoluene with \(KNH_2\) in liquid \(NH_3\), the major product is

m-toluidine

The correct answer is option 2. m-toluidine.

The major product of the reaction of p-chlorotoluene with \(KNH_2\) in liquid \(NH_3\) is m-toluidine.

The reaction proceeds through the formation of a benzyne intermediate, which can then react with the \(KNH_2\) to form either o-toluidine, m-toluidine, or p-toluidine. However, the m-position is the most stable position for the amine group, so the major product is m-toluidine.

The other options are incorrect. Option (1), o-toluidine, is a minor product of the reaction. Option (3), p-toluidine, is also a minor product of the reaction. Option (4), p-chloroaniline, is not produced in this reaction.