According to IUPAC system, the compound is named as:

IUPAC Nomenclature Rules:

1. Principal functional group gets priority (lowest number)
2. Number the ring to give the principal group the lowest locant
3. Double bond position is indicated after the parent name
4. For cyclic compounds with OH group: cyclohex + en (double bond) + ol (alcohol)

Step 1: Identify functional groups

• OH group (alcohol) - principal functional group
• C=C double bond

Step 2: Numbering Start numbering from the carbon bearing the OH group:

• Position 1: Carbon with OH group
• Position 2: Carbon involved in double bond (adjacent to position 1)

Step 3: Construct the name

• Parent: Cyclohex (6-membered ring)
• Double bond at position 2: -2-en-
• OH at position 1: -1-ol

IUPAC Name: Cyclohex-2-en-1-ol

$\boxed{\text{Answer: (d) Cyclohex-2-en-1-ol}}$