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B
p−NO2C6H4NH2
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C
m−NO2C6H4NH2
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D
C6H5CH2NH2
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Solution
The correct option is DC6H5CH2NH2 Lone pair of electrons is reponsible for the Lewis basic nature of amino group. In benzamine (d) the lone pair is free and is not taking part in resonance, and hence most basic. In other cases, lone pair of nitrogen is part of delocalisation which decreases Lewis base strength.