Question

Which of the following is aromatic in nature?

• A.
• B.
• C.
• D. All of these

Answer 1

The correct option is D All of these

(a) It has 2 $\pi$-$e^{-}$.
(b) It has 6 $\pi$-$e^{-}$.
(c) It has 6 $\pi$-$e^{-}$.

All the molecules are cyclic, planar conjugated molecules having $(4n+2)\pi$-$e^{-}$ (follows Huckel's rule).
Hence all of the given compounds are aromatic.