Ozonolysis of $2-$butene followed by reaction with $\mathrm{Zn}$ dust and water gives a compound $\left(\mathrm{A}\right)$. The compound $\left(\mathrm{A}\right)$ on further treatment with aqueous $\mathrm{NaOH}$ yields compound $\left(\mathrm{B}\right)$, which on further heating gives $\left(\mathrm{C}\right)$. What is the IUPAC name of compound $\left(\mathrm{C}\right)$?

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.

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

In the following reaction sequence

X and Y are

In the reaction

The major product of the following reaction is: