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Compound ' \(A\) ' undergoes formation of cyanohydrins, which on hydrolysis gives lactic acid \(\left(\mathrm{CH}_3 \mathrm{CHOHCOOH}\right)\). Therefore, compound ' \(A\) ' is ____
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The correct answer is:
acetaldehyde
Acetaldehyde on reaction with hydrogen cyanide gives cyanohydrin which on hydrolysis gives lactic acid.

Therefore compound \(A\) is acetaldehyde. Hence, the correct option is (b).

Therefore compound \(A\) is acetaldehyde. Hence, the correct option is (b).
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