The product $(A)$ of the following reaction is (bromination does not occur in the benzene ring):

Identify an aldehyde used in margarine and in food for its buttery odour.

Given below are two statements :
Statement $I :$ The nucleophilic addition of sodium hydrogen sulphite to an aldehyde or a ketone involves proton transfer to form a stable ion.
Statement $II :$ The nucleophilic addition of hydrogen cyanide to an aldehyde or a ketone yields amine as final product.
In the light of the above statements,choose the most appropriate answer from the options given below :

What is the major product formed when salicylaldehyde is reacted with $2$ equivalents of bromine in glacial acetic acid at $0^{\circ} C$?

Which of the following aldehydes will undergo the Cannizzaro reaction with a base?

Upon treatment with $Al(OEt)_3$ followed by usual reactions (work up), $CH_3CHO$ will produce