Which of the following species should be aromatic in character?
In 1931, German chemist and physicist Erich Hückel proposed a rule to determine if a planar ring molecule would have aromatic properties. This rule states that if a cyclic, planar molecule has 4n+2π electrons, it is aromatic. This rule would come to be known as Hückel's Rule.
From the above options A, B, C cannot be correct because of not being satisfied with huckle's rule.