Question

The number of compounds that give Cannizzaro reaction is:

Answer 1

Cannizzaro reaction involves base-induced disproportionation of 2 molecules of non-enolizable aldehyde to give alcohol and carboxylic acid salt. $\alpha -H$ should be absent for this reaction to happen.
Following moleucles can give this reaction.

$CC{l}_3-CHO$ (Chloral) does not give cannizzaro reaction as it undergoes haloform reaction in the presence of strong alkali.