Cannizzaro reaction is not given by:

Explanation:

Aldehydes and ketones do not contain any alpha hydrogen gives response to the Cannizzaro reaction.

Hydrogen that is present on the carbon (alpha carbon) next to the carbonyl carbon, called a Trimethyl acetaldehyde has three methyl groups attached to the alpha carbon and no alpha hydrogen are present. So, it does not show any Cannizzaro reaction.

Trimethyl acetaldehyde has three methyl groups attached to the alpha carbon and no alpha hydrogen are present. So, it does not show any Cannizzaro reaction.

In acetaldehyde three alpha hydrogen are attached to the alpha carbon, present next to the C=O group, so it will Show Cannizzaro reaction.

In benzaldehyde there is a benzyl group attached to the alpha carbon and no alpha hydrogen; so it will give a Cannizzaro reaction.

In formaldehyde there is no such alpha carbon, so it will not give Cannizzaro reaction.

Final Answer :

So final answer is B acetaldehyde