A primary aliphatic amine on reaction with nitrous acid in cold $\left(273 \mathrm{K}\right)$ and there after raising temperature of reaction mixture to room temperature $\left(298 \mathrm{K}\right)$, gives a/an

The major product $\mathrm{P}$ of the given reaction is (where, $\mathrm{Me}$ is $-{\mathrm{CH}}_3$)

${\mathrm{C}}_6{\mathrm{H}}_{12}{\mathrm{O}}_6\stackrel{\mathrm{Zymase}}{⟶}\mathrm{A}\underset{∆}{\overset{\mathrm{NaOI}}{\to }}\mathrm{B}+{\mathrm{CHI}}_3$

The number of carbon atoms present in the product $\mathrm{B}$ is

In the given reaction 

the number of ${\mathrm{sp}}^2$ hybridised carbon (s) in compound $\text{'}\mathrm{X}\text{'}$ is _______.

Given below are two statements :

Statement I : On heating with ${\mathrm{KHSO}}_4$, glycerol is dehydrated and acrolein is formed.

Statement II : Acrolein has fruity odour and can be used to test glycerol's presence.

Choose the correct option.

Identify the major product $\mathrm{A}$ and $\mathrm{B}$ for the below given reaction sequence.

The major product in the given reaction is