Compound $"\mathrm{X}"$ undergoes the following sequence of reactions to form $"\mathrm{Y}"$.

Compound $"\mathrm{Y}"$ is

The product $\left(\text{'}\text{'}\mathrm{X}\text{'}\text{'}\right)$ of the following sequence of reactions is

Three isomeric compounds $\mathrm{M}, \mathrm{N},$ and $\mathrm{P}\left({\mathrm{C}}_5{\mathrm{H}}_{10}\mathrm{O}\right)$ give the following tests:
(i) $\mathrm{M}$ and $\mathrm{P}$ react with sodium bisulfite to form an adduct $\mathrm{J}$

(ii) $\mathrm{N}$ consumes $1 \mathrm{mol}$ of bromine and also gives turbidity with conc. $\mathrm{HCl}$/anhydrous ${\mathrm{ZnCl}}_2$ after prolong heating

(iii) $\mathrm{M}$ reacts with excess of iodine in allkaline solution to give yellow crystalline compound with a characteristic smell.

(iv) $\mathrm{p}$- Rosaniline treated with sulphur dioxide develops pink colour on shaking with $\mathrm{P}$ The structure of$\mathrm{M}, \mathrm{N},$ and $\mathrm{P},$ respectively are

$4$-Hydroxy-$4$-methylpentanal on heating with excess of methanol in the presence of an acid catalyst followed by the dehydration of the product gives

The compound ${}^{\text{'}}\mathrm{X}^{\text{'}}$ in the following reaction is 

The compound $\text{'}\mathrm{X}\text{'}$ in the following reaction is

The compound $\text{'}\mathrm{P}\text{'}$ that undergoes the sequence of reactions given below to give the product $\mathrm{Q}$ is

The major product of the following reaction is