Major product of this reaction is:
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This is a nucleophilic substitution reaction where the cyanide ion (CN⁻) attacks the carbonyl carbon. The reaction follows the addition-elimination mechanism. The cyanide ion is a strong nucleophile, and the carbonyl carbon is electrophilic due to the electron-withdrawing nitro group. The major product is formed by the replacement of the chlorine atom with the cyano group.
The correct major product is the one where the cyano group is attached to the carbonyl carbon, forming an acid derivative. The structure is: .
Final Answer: The second option.