A.  |
B.  |
C.  |
D.  |
A) A < C < B < A
B) C < B > A > D
C) D > A > B > C
D) C > D> B > A
Correct Answer: B
Solution :
In [b] and [c] lone pair \[{{x}^{2}}+{{y}^{2}}=9,\] of N not involved in delocalisation with oxygen whereas in [d] it involves hence basicity decreases drastically.
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