Cannizzaro reaction between formaldehyde molecules involves the formation of

The product $(A)$ is:

Which of the following compounds does not give an Aldol condensation reaction?

Consider the above reaction,the major product $'P'$ is:-

The major product in the following transformation is

An organic compound contains $69.77 \%$ carbon,$11.63 \%$ hydrogen and the rest is oxygen. The molecular mass of the compound is $86$. It does not reduce Tollens' reagent but forms an addition compound with sodium hydrogensulphite and gives a positive iodoform test. On vigorous oxidation,it gives ethanoic acid and propanoic acid. Write the possible structure of the compound.