The reagent(s) required for the following conversion are:

The major product of the following reaction is:

The increasing order of the reactivity of the following with $\text{L}\text{i}\text{A}\text{l}{\text{H}}_4$ is:

$\left(A\right)$

$\left(B\right)$

$\left(C\right)$

$\left(D\right)$

The major product of the following reaction is:

In the following reactions, products $\mathrm{A}$ and $\mathrm{B}$ are:

The major product of the following reaction is: