Arrange the following amines in the decreasing order of basicity:

I I > I I > I I I

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I I I > I I > I

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I > I I I > I I

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I I I > I > I I

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Solution

The correct option is D $I I I > I > I I$
Basic strength increases as the electron donating capacity of nitrogen increases.
In compound III, the nitrogen has two lone pairs of electrons for donation whereas, in compound II, the lone pair of electrons are delocalized in the aromatic ring.

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