Which of the following ions is aromatic?

Step-by-step solution

According to Huckel's rule, a species is aromatic if it is cyclic, planar, completely conjugated, and has (4n + 2) electrons, where n is an integer ( 0, 1, 2, ). Let us evaluate each option: Option (A): The given ion is a cyclohexadienyl cation. It contains an sp^3 hybridized carbon atom, which breaks the continuous delocalization of electrons. Therefore, it is non-aromatic. Option (B): The given ion is a hydroxycyclopropenyl cation. The ring is cyclic, planar, and completely conjugated. It has 2 electrons in the r