Identify the product obtained in following reaction. $\mathrm{C}_6 \mathrm{H}_6 \xrightarrow[\text { Anhyd. } \mathrm{AlCl} \mathrm{Cl} \text { pessure }]{\mathrm{CO}} \text { product }$

• A

  $\mathrm{C}_6 \mathrm{H}_5 \mathrm{COOH}$
• Correct answer
  B

  $\mathrm{C}_6 \mathrm{H}_5 \mathrm{CHO}$
• C

  $\mathrm{C}_6 \mathrm{H}_5 \mathrm{CHCl}_2$
• D

  $\mathrm{C}_6 \mathrm{H}_5 \mathrm{Cl}$

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