GENERAL ORGANIC CHEMISTRY
231819
The IUPAC name of
$\mathrm{CH}_{3}-\mathrm{CH}(\mathrm{OH}) \mathrm{CH}_{2} \mathrm{CH}\left(\mathrm{CH}_{3}\right) \mathrm{CHO}$ is
1 4-hydroxy-1-methylpentanal
2 4-hydroxy-2-methylpentanal
3 2-hydroxy-4-methylpentanal
4 2-hydroxy-2-methylpentanal
Explanation:
The structure of the compound is -

4-hydroxy-2-methylpentanal