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Question:

The increasing order of the reactivity of the following compounds towards electrophilic aromatic substitution reaction is:

II<I<III

III<II<I

I<III<II

III<I<II

Solution:

Reactivity for electrophilic aromatic substitution reaction depends on the electron density of the aromatic ring. Rate of aromatic electrophilic substitution is III<II<I. Hence, the correct option is C.