An alkene (A) ${\mathrm{C}}_{16}{\mathrm{H}}_{16}$ on ozonolysis gives only one product (B) $\left({\mathrm{C}}_8{\mathrm{H}}_8\mathrm{O}\right)$. Compound (B) on reaction with ${\mathrm{N}\mathrm{H}}_2\mathrm{O}\mathrm{H}/{\mathrm{H}}_2{\mathrm{S}\mathrm{O}}_4,\mathrm{\Delta }$ gives $\mathrm{N}$-methyl benzamide the compound $\mathrm{\prime }\mathrm{A}\mathrm{\prime }$ is -

In the following reaction sequence

X and Y are

In the given reaction, the product $\mathrm{P}$ is

The major product in the following conversion is

The major product of the following reaction is:

What is the major product expected from the following reaction?



Where D is an isotope of hydrogen.

The major product of the following reaction is: