Solution;
Option (iv) is the answer.
Reason:
Option (iv) is the strongest Bronsted base as there is no delocalization of lone pair of electron of the atom which is not possible in aniline and in pyrrole.
Solution;
Option (iv) is the answer.
Reason:
Option (iv) is the strongest Bronsted base as there is no delocalization of lone pair of electron of the atom which is not possible in aniline and in pyrrole.