Chemistry - GOC Question with Solution | TestHub

Thiophene (6π, S lone pair in the ring) and naphthalene (10π) are aromatic and have a significant resonance energy. Cycloheptatriene (III) has an $\mathrm{s}{\mathrm{p}}^3$ $\mathrm{C}{\mathrm{H}}_2$ group and is not aromatic. So I and II.