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(D) The reactivity of benzene derivatives towards electrophilic aromatic substitution depends on the nature of the substituent attached to the ring.$I

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$II > III > I > IV$

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(D) The reactivity of benzene derivatives towards electrophilic aromatic substitution depends on the nature of the substituent attached to the ring.$II$: $-N(CH_3)_2$ is a strongly activating group due to the $+M$ effect of the lone pair on nitrogen.$III$: $-OCOCH_3$ is a moderately activating group due to the $+M$ effect of the oxygen atom,though it is less activating than $-N(CH_3)_2$.$I$: $-CH_2CO_2H$ is a deactivating group because the $-CH_2-$ group is attached to an electron-withdrawing carboxylic acid group,exerting an $-I$ effect.$IV$: $-CCl_3$ is a strongly deactivating group due to the strong $-I$ effect of the three chlorine atoms.Therefore,the order of reactivity is $II > III > I > IV$.

What is the expected order of reactivity of the following compounds in electrophilic chlorination $(Cl_2 + FeCl_3)$? (more reactive $ > $ less reactive)
$I: C_6H_5CH_2CO_2H$
$II: C_6H_5N(CH_3)_2$
$III: C_6H_5OCOCH_3$
$IV: C_6H_5CCl_3$

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What is the expected order of reactivity of the following compounds in electrophilic chlorination $(Cl_2 + FeCl_3)$? (more reactive $ > $ less reactive)$I: C_6H_5CH_2CO_2H$$II: C_6H_5N(CH_3)_2$$III: C_6H_5OCOCH_3$$IV: C_6H_5CCl_3$