- 2-methylbutan-2-ol
Explanation:
The IUPAC name of the given compound is 2-Methylbutan-2-ol.
The parent hydrocarbon contains 4 carbon atoms and is named butane.
A methyl substituent is present at second C atom.
A hydroxyl group is present at second C atom.
Hence, the last alphabet e of butane is replaced with the suffix -2-ol.