The rate of attack of an electrophile is leas | vedclass

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(A) Electrophilic aromatic substitution is favored by electron-donating groups (activating groups) and disfavored by electron-withdrawing groups (deac

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$-NO_2$

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(A) Electrophilic aromatic substitution is favored by electron-donating groups (activating groups) and disfavored by electron-withdrawing groups (deactivating groups).$-OH$,$-NH_2$,and $-CH_3$ are electron-donating groups that increase the electron density of the benzene ring,thereby facilitating the electrophilic attack.$-NO_2$ is a strong electron-withdrawing group due to both its $-I$ (inductive) and $-M$ (mesomeric) effects.It significantly reduces the electron density of the benzene ring,making it the least reactive towards electrophilic attack.

The rate of attack of an electrophile is least when $X$ in the given compound is

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