In the reactions sequence, conversion of $\mathrm{B}$ to $\mathrm{C}$ is known as

• A

  Stephen's reaction
• B

  Rosenmund reduction
• Correct answer
  C

  Etard reaction
• D

  Gatterman reaction

Solution

This reaction is known as etard reaction that converts taluene to benzaldehyde.

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