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(B) Electrophilic aromatic substitution reactivity depends on the electron density of the benzene ring.Groups that donate electrons via inductive $(+I

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$II > III > IV > I$

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(B) Electrophilic aromatic substitution reactivity depends on the electron density of the benzene ring.Groups that donate electrons via inductive $(+I)$ or hyperconjugation effects activate the ring,while electron-withdrawing groups deactivate it.$II$ (Toluene) has a $-CH_3$ group,which activates the ring via $+I$ and hyperconjugation.$III$ (Ethylbenzene) has a $-CH_2CH_3$ group,which also activates the ring via $+I$ and hyperconjugation,but the $-CH_3$ group in toluene is a slightly stronger activator due to less steric hindrance and slightly better hyperconjugative stabilization compared to the ethyl group in some contexts,or they are very similar; however,standard reactivity order for alkylbenzenes is $Toluene > Ethylbenzene$.$IV$ (Benzene) has no substituents.$I$ (Phenyl benzoate) has a $-COOC_6H_5$ group,which is a strong electron-withdrawing group ($-I$ and $-M$ effects),significantly deactivating the ring.Thus,the order of reactivity is $II > III > IV > I$.

Decide the correct order of reactivity of the following compounds towards electrophilic aromatic substitution (halogenation) with $(Cl_2 + AlCl_3)$:
$I$: Phenyl benzoate $(C_6H_5COOC_6H_5)$
$II$: Toluene $(C_6H_5CH_3)$
$III$: Ethylbenzene $(C_6H_5CH_2CH_3)$
$IV$: Benzene $(C_6H_6)$

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Decide the correct order of reactivity of the following compounds towards electrophilic aromatic substitution (halogenation) with $(Cl_2 + AlCl_3)$:$I$: Phenyl benzoate $(C_6H_5COOC_6H_5)$$II$: Toluene $(C_6H_5CH_3)$$III$: Ethylbenzene $(C_6H_5CH_2CH_3)$$IV$: Benzene $(C_6H_6)$