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.