Which one of the following reacts with HCN an | vedclass

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(C) $1$. $HCN$ reacts with all aldehydes and ketones to form cyanohydrins.$2$. Tollen's reagent is a mild oxidizing agent that oxidizes all aldehydes

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Benzaldehyde

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(C) $1$. $HCN$ reacts with all aldehydes and ketones to form cyanohydrins.$2$. Tollen's reagent is a mild oxidizing agent that oxidizes all aldehydes (both aliphatic and aromatic) to their corresponding carboxylate ions.$3$. Fehling's solution is a milder oxidizing agent than Tollen's reagent and is capable of oxidizing only aliphatic aldehydes,but not aromatic aldehydes (like benzaldehyde) or ketones.$4$. Benzaldehyde $(C_6H_5CHO)$ reacts with $HCN$ and Tollen's reagent,but it is not oxidized by Fehling's solution because it is an aromatic aldehyde.

Which one of the following reacts with $HCN$ and Tollen's reagent,but is not oxidised by Fehling's solution?

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