The IUPAC name of

The correct answer is option 1. 1-Methoxy-2-methylbut-3-en-2-ol.

The longest straight chain contains four carbon atoms and the main functional group is alcohol. There is a methyl group present at the 2nd carbon also there is an \(OH\) group at the 2nd position. There is a double bond present at the 3rd carbon. Thus the IUPAC name of the compound will be 1-Methoxy-2-methylbut-3-en-2-ol.