Among the following substituted pyridines,the | vedclass

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(B) Pyridine is basic in nature due to the presence of a free lone pair on the nitrogen atom. Its basicity is influenced by the substituents attached

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$4-$(Dimethylamino)pyridine

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(B) Pyridine is basic in nature due to the presence of a free lone pair on the nitrogen atom. Its basicity is influenced by the substituents attached to the ring. Electron-withdrawing groups $(EWG)$ decrease the basicity of pyridine,while electron-releasing groups $(ERG)$ increase its basicity.Substituents like $-N(CH_3)_2$ and $-CH_3$ are electron-releasing,but the $-N(CH_3)_2$ group is a much stronger electron-donating group due to the resonance effect (+$R$ effect) compared to the inductive effect (+$I$ effect) of the $-CH_3$ group.Conversely,the $-Cl$ group is electron-withdrawing due to its strong inductive effect (-$I$ effect),which decreases the electron density on the nitrogen atom,making it the least basic.The order of basicity is: $4	ext{-Chloropyridine} Therefore,$4	ext{-(Dimethylamino)pyridine}$ is the most basic compound.

Among the following substituted pyridines,the most basic compound is

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