Relative basic strength of following compounds is

IV > II > III > I

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III > I > IV > II

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I > III > II > IV

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II > IV > I > III

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Solution

The correct option is C I > III > II > IV
$s p^{2}$ hybridised N-atom (more electronegative than $s p^{3}$ hybridised N-atom) is less basic. Due to aromaticity, Pyrrole is least basic.

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