The final product formed when acetaldehyde is reduced with sodium and alcohol is

Compound $A$ $(C_9H_{10}O)$ shows a positive iodoform test. Oxidation of $A$ with $KMnO_4/KOH$ gives acid $B$ $(C_8H_6O_4)$. The anhydride of $B$ is used for the preparation of phenolphthalein. Compound $A$ is:

The major product formed in the reaction is

Which of the following is an incorrect match for differentiating the given compounds?

What is the major product of the following reaction?

The product $A$ obtained in the following reaction is: