How many stereoisomers can be drawn for the following molecule?
${\mathrm{H}}_3{\mathrm{CCH}}_2\mathrm{CH}\underset{}{=}{\mathrm{CHCH}}_2\underset{}{\mathrm{C}}\mathrm{H}\left(\mathrm{Cl}\right){\mathrm{CH}}_3$

The major product of the following reaction is:

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

The major product in the following conversion 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:

The major product of the following reaction is: