Chemistry - GOC Question with Solution | TestHub

I (pyrrole) is aromatic and its lone pair is involved in aromatic sextet → least basic.

II (pyridine) is aromatic but lone pair is not in π-system → more basic than I.

III (cyclohexylamine) is aliphatic amine → no resonance, so more basic than II.

IV has conjugation with benzene + –NH group → most stabilized conjugate acid → highest basicity.

Hence order: I < II < III < IV, so statement C is correct.

Also, conjugate acid of IV is more resonance stabilized than II → D is correct.