Identify the weakest base amongst the following :

Options

A. p-methoxyaniline
B. o-toluidine
C. Benzene-1, 4-diamine
D. 4-aminobenzoic acid

Answer

B

Explanation

p-methoxyaniline group, donates electrons to the benzene ring thereby increasing group `(-OCH_(3))` being the electron donating group, donates electrons to the benzene ring thereby increasing the concentration of electrons on the ring and thus the attack of nucleophile becomes difficult.