IUPAC Naming Rules for Alcohols Steps:

• Identify the longest carbon chain containing the OH group for each structure.
• Number the chain to give the OH the lowest position number.
• Name substituents alphabetically with prefixes.
• Verify if the given name matches the structure's features.

Why C is correct:

• Q's structure has the OH on the correct carbon of the parent chain with proper numbering and no naming errors, adhering to IUPAC rules.

Why the others are wrong:

• P is misnamed because the chain is numbered incorrectly, giving OH a higher position than possible.
• R is incorrect as it uses a wrong parent chain length, ignoring the longest carbon sequence with OH.

Final answer: C