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Which of the options correctly represent the basicity for these compounds?
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The correct answer is:
i $>$ ii $>$ iii
$\mathrm{NO}_2$ have-I effect so, basicity decreases with the closeness of $-\mathrm{NO}_2$ group with $-\mathrm{NH}_2$ group. So, the order will be $(i)>(i i)>($ iit $)$.
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