Question

The major product in the following reaction sequence is 

Hint:

Benzoin condensation is a key reaction for forming benzoin derivatives, often followed by oxidation and further functional group transformations.

Answer 1

Step 1: Reaction with KCN/EtOH.
The reaction with KCN/EtOH leads to the formation of a benzoin derivative through a benzoin condensation reaction. In this step, the cyanide ion acts as a nucleophile and attacks the carbonyl carbon.
Step 2: Reaction with dilute HNO\(_3\).
The treatment with dilute HNO\(_3\) is likely to result in oxidation of the intermediate, further affecting the functional groups on the molecule.
Step 3: Reaction with aqueous KOH.
The aqueous KOH treatment will likely result in the formation of a carboxylate ion, which is common in the product after oxidation and condensation steps.
Step 4: Conclusion.
The major product, based on the given reagents and sequence, is the compound shown in option (A).
Final Answer: \[ \boxed{\text{The major product is shown in Option (A).}} \]