Determine whether the cation shown below is aromatic, antiaromatic, or nonaromatic. If it is aromatic, calculate its n from Hückel's rule. If not, explain how it violates the aromaticity requirements.

The cation nonaromatic since its n= 1/2

The cation is aromatic. Its n is 1.

The molecule is antiaromatic. It is cyclic, planar and conjugated, but it has 4n electrons.

The molecule is nonaromatic. It violates all the Huckel's rule.