2‑methylpropan‑2‑ol is an example of a

Correct answer: tertiary alkanol (Option C)

Explanation: 2-methylpropan-2-ol is tert-butanol, with structure (CH₃)₃C–OH. The carbon bearing the –OH group is attached to three other carbons, so it is a tertiary alcohol.

• Primary alkanol: –OH carbon attached to only one alkyl group (not the case here).
• Secondary alkanol: –OH carbon attached to two alkyl groups (not the case here).
• Quaternary alkanol: Not possible; a quaternary carbon cannot also bear –OH.