Write the IUPAC name of the compound. CH3−CH−CH2−COOH|OH

The IUPAC name of given compound is 3-hydroxy butanoic acid. The parent compound contains 4 C atoms. Hence, it is derivative of butane. A -COOH group is present. Hence, the last alphabate of butane is replaced with oic acid. A hydroxy group is present as substituent on third C atom. Hence, it is named 3-hydroxy butanoic acid.