Acetaldehyde reacts with a mixture of $\mathrm{KCN}$ and  ${\mathrm{NH}}_4\mathrm{Cl}$ to give a product $\mathrm{X}$ which upon hydrolysis yields alanine. The product $\mathrm{X}$ is

When meta chlorobenzaldehyde is treated with $50\%$ $\mathrm{KOH}$, the product obtained is:

Consider the following reactions:

($\mathrm{LDA}=$ lithium diisopropyl amide)

The product $\mathrm{M}$ and $\mathrm{Y}$ respectively are:

The most favourable product of the following reaction is:

Curved arrows are used in Organic Chemistry to show the movements of electrons in the mechanism of a reaction. The correct product of the following reaction is: