A) \[{{C}_{6}}{{H}_{5}}N{{H}_{2}}\]
B) \[p-N{{O}_{2}}{{C}_{6}}{{H}_{4}}N{{H}_{2}}\]
C) \[m-N{{O}_{2}}-{{C}_{6}}{{H}_{4}}N{{H}_{2}}\]
D) \[{{C}_{6}}{{H}_{5}}C{{H}_{2}}N{{H}_{2}}\]
Correct Answer: D
Solution :
Lone pair is not taking pair in resonance, most basic. In other cases, lone pair of nitrogen is part of delocalization which decreases Lewis base strength.
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