Two isomers $\left(\mathrm{A}\right)$ and $\left(\mathrm{B}\right)$ with Molar mass $184 \mathrm{g}/\mathrm{mol}$ and elemental compositio $\mathrm{C}, 52.2\%; \mathrm{H}, 49\%$ and $\mathrm{Br} 42.9\%$ gave benzoic acid and $\mathrm{p}-$ bromobenzoic acid, respectively on oxidation with ${\mathrm{KMnO}}_4$. Isomer $\text{'}\mathrm{A}\text{'}$ is optically active and gives a pale yellow precipitate when warmed with alcoholic ${\mathrm{AgNO}}_3$. Isomer $\text{'}\mathrm{A}\text{'}$ and $\text{'}\mathrm{B}\text{'}$ are, respectively :

• A

  

   

• B

  

   

• Correct answer
  C

  ${\mathrm{H}}_3\mathrm{C}-\mathrm{CHBr}-{\mathrm{C}}_6{\mathrm{H}}_5$ and 

   

• D

   and ${\mathrm{H}}_3\mathrm{C}-\mathrm{CHBr}-{\mathrm{C}}_6{\mathrm{H}}_5$

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