Which of the following represents an aromatic compound?A. C6H5OHB. C6H12C. C6H9OHD. C6H8

The aromatic compounds are a type of cyclic compounds which follow the Hückel's rule. According to this rule, a compound is aromatic if it has a planar, cyclic, and completely conjugated system with (4n+2) π electrons, where n is a whole number including zero.

Let's analyze the options:

A. C6H5OH: This is phenol, which has a benzene ring (an aromatic compound) with a hydroxyl group attached. So, it is an aromatic compound.

B. C6H12: This is cyclohexane, which is a cycloalkane, not an aromatic compound.

C. C6H9OH: This compound doesn't exist with this formula.

D. C6H8: This is 1,3-Cyclohexadiene, which is not aromatic because it doesn't have a completely conjugated system.

So, the answer is A. C6H5OH.