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(A) The reactivity towards electrophilic substitution depends on the electron density of the benzene ring.In Aniline $(I)$,the $-NH_2$ group is a stro

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$I > II > III$

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(A) The reactivity towards electrophilic substitution depends on the electron density of the benzene ring.In Aniline $(I)$,the $-NH_2$ group is a strong electron-donating group due to its $+M$ effect,which increases electron density at the ortho and para positions,making it highly reactive.In Benzene $(II)$,there is no substituent to alter the electron density.In Nitrobenzene $(III)$,the $-NO_2$ group is a strong electron-withdrawing group due to both $-I$ and $-M$ effects,which significantly decreases the electron density of the ring,making it the least reactive.Therefore,the order of reactivity is $I > II > III$.

Arrange the following compounds in the decreasing order of their reactivity towards electrophilic substitution reaction: Aniline $(I)$,Benzene $(II)$,and Nitrobenzene $(III)$.

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