Interpret the structure

The compound is a cyclohexene ring containing:

• one double bond
• one hydroxyl group $(-OH)$

Since the hydroxyl group has higher priority than the double bond for suffix naming, the parent name must use ol as the suffix.

Choose the parent ring

The parent hydrocarbon is cyclohexene with an alcohol group, so the parent will be named as a cyclohexenol derivative.

Number the ring according to IUPAC priority

In cyclic alcohols, numbering starts from the carbon bearing the $-OH$ group because alcohol gets the principal suffix.

So the carbon attached to $-OH$ is numbered 1.

Locate the double bond

After assigning carbon 1 to the $-OH$ carbon, number the ring in the direction that gives the double bond the lowest possible locant.

This places the double bond between carbon 2 and carbon 3.

Therefore, the name becomes: $\text{Cyclohex-2-en-1-ol}$

Check the options

• A: Cyclohex-2-en-1-ol ✅ Correct
• B: 1-Hydroxyhex-2-ene ❌ Incorrect, because the compound is cyclic, not an open-chain hexene.
• C: Cyclohex-1-en-3-ol ❌ Incorrect numbering; $-OH$ should get locant 1.
• D: Cyclohex-1-en-2-ol ❌ Incorrect, because the hydroxyl group should be carbon 1.

Final answer

The correct IUPAC name is: $\boxed{\text{Cyclohex-2-en-1-ol}}$