Correct Answer - B
In (C), electron on N-atom are delocalized over two doublle bond but in (D), electrons are more strongly delocalized delocalized over the benzene ring but in (B), the electrons are not delocalized, at all, therefore, it is the strongest base, Further, being a `2^(@)` amine, it is more basic than even `NH_(3)`. Hence option (B) is true.