Which one of the following undergoes nucleoph | vedclass

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(A) Nucleophilic aromatic substitution $(S_NAr)$ reactions are facilitated by the presence of electron-withdrawing groups (EWGs) on the benzene ring,e

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p-Nitrochlorobenzene

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(A) Nucleophilic aromatic substitution $(S_NAr)$ reactions are facilitated by the presence of electron-withdrawing groups (EWGs) on the benzene ring,especially at ortho and para positions.These groups stabilize the negatively charged intermediate (Meisenheimer complex) through resonance ($-M$ effect) and induction ($-I$ effect).The order of electron-withdrawing strength for the substituents at the para position is: $NO_2 > Cl > CH_3 > OCH_3$.$NO_2$ is a strong electron-withdrawing group ($-M$ and $-I$ effect),which significantly increases the rate of $S_NAr$ reaction.Therefore,$p$-Nitrochlorobenzene undergoes nucleophilic aromatic substitution at the fastest rate.

Which one of the following undergoes nucleophilic aromatic substitution at the fastest rate?

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