The major product of the given reaction is:

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(B) The reaction shown is a Friedel-Crafts alkylation of toluene with methyl chloride $(CH_3Cl)$ in the presence of an anhydrous $AlCl_3$ catalyst.Sin

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$p-$xylene

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(B) The reaction shown is a Friedel-Crafts alkylation of toluene with methyl chloride $(CH_3Cl)$ in the presence of an anhydrous $AlCl_3$ catalyst.Since the methyl group $(-CH_3)$ on the benzene ring is an ortho/para-directing group,the electrophilic substitution occurs at the ortho and para positions.Due to steric hindrance at the ortho position,the para-isomer ($p-$xylene) is formed as the major product.

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