In the reaction, The major product formed is

• A

  $\mathrm{C}_6 \mathrm{H}_5-\mathrm{CH}_2-\mathrm{CHO}$
• B

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

  $\mathrm{C}_6 \mathrm{H}_5-\mathrm{CH}=\mathrm{CH}-\mathrm{COOH}$
• D

  $\mathrm{C}_6 \mathrm{H}_5-\mathrm{CH}=\mathrm{CH}-\mathrm{COCH}_3$

Solution

The given reaction is an example of Perkin condensation. In this, reaction aromatic aldehydes react with acid anhydride of an aliphatic acid in presence of sodium salt of same acid to form $\alpha, \beta$-unsaturated acid. The steps involved in the process are as follows Thus, the correct option is (c).

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