Consider the following reaction
The product ' $A$ ' is

• Correct answer
  A

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

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

  $\mathrm{C}_6 \mathrm{H}_5 \mathrm{COCH}_3$
• D

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

Solution

In Rosenmund reaction, acid chloride reacts with $\mathrm{H}_2$ in the presence of $\mathrm{Pd} / \mathrm{BaSO}_4$ to yield aldehyde.

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