Which of the following is the strongest base?

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Question

(D) The basicity of amines depends on the availability of the lone pair of electrons on the nitrogen atom for protonation.In aromatic amines like $C_6

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$CH_3NH_2$

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(D) The basicity of amines depends on the availability of the lone pair of electrons on the nitrogen atom for protonation.In aromatic amines like $C_6H_5NH_2$,$C_6H_5NHCH_3$,and $C_6H_5N(CH_3)_2$,the lone pair of electrons on the nitrogen atom is involved in resonance with the benzene ring,which decreases its availability for protonation.In aliphatic amines like $CH_3NH_2$,there is no such resonance,and the electron-donating inductive effect of the alkyl group increases the electron density on the nitrogen atom,making it more available for protonation.Therefore,$CH_3NH_2$ is a much stronger base than the given aromatic amines.

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