What is the name of the following reaction? $\mathrm{PhCHO}+\left(\mathrm{CH}_3 \mathrm{CO}\right)_2 \mathrm{O} \stackrel{\mathrm{Na}(\mathrm{OAc})_2}{\longrightarrow} \underset{\mathrm{PhCH}}{\longrightarrow}=\mathrm{CHCO}_2 \mathrm{H}$

• A

  Oxymercuration demercuration reaction
• B

  Cannizzaro reaction
• C

  Knoevenagel's reaction
• Correct answer
  D

  Perkin reaction

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