Which of the following will exhibit aromatic character?

Options

A. I,III
B. III,IV
C. II,IV
D. II,III

Answer

C

Explanation

Since in azulene (IV) two rings share a double bond, therefore, two electrons of this double bond can be counted towards each. As a result, each ring has `6pi`-electrons and hence azulene is aromatic. Pyrrole (II), is aromatic because it contains `6pi`-electrons (four from the two double bonds+one lone pair of electrons on the N atom).