In the IUPAC system, $PhCH_{2}CH_{2}\mathrm{CO}_{2} \mathrm{H}$ is named as

• Correct answer
  A

  3 -phenylpropanoic acid
• B

  benzylacetic acid
• C

  carboxyethylbenzene
• D

  2 -phenylpropanoic acid

Solution

IUPAC name of $\mathrm{Ph} \cdot \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{CO}_{2} \mathrm{H}$ is, 3-phenylpropanoic acid

Hence, the correct answer is option: 'A'.