IUPAC name of m-cresol is:

1. 3-Methylphenol 2. 3-Chlorophenol
3. 3-Methoxyphenol 4. Benzene-1,3-diol

Hint: Both -OH and -CH3 group attach to benzene ring

The structure of m-cresol is as follows:

m-Cresol - Wikipedia

Here -OH group gets higher priority than -CH3 group. Hence, the numbering is started from OH group. The structure with numbering is as follows:



Hence, the IUPAC name of the compound is 3-methylphenol.