Explanation:
\({\rm{\beta }}\)-chlorobutyric acid is
\(\begin{array}{*{20}{l}}{{\text{C}}{{\text{H}}_{\text{3}}}{\text{CH(Cl)C}}{{\text{H}}_{\text{2}}}{\text{COOH}}} \\ {{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} \,\,{\text{4}}\,\,\,\,\,\,\,\,{\text{3}}{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} \,\,\,\,\,\,\,\,\,{\text{2}}{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} \,\,\,\,\,\,{\text{1}}} \end{array}\)
IUPAC name: 3-chlorobutanoic acid