In the following sequence of reactions the maximum number of atoms present in molecule $\text{C}$ in ${\text{sp}}^{\text{3}}$ hybridised state is
$\text{A}\stackrel{\text{Red}\text{hot}\text{Cu}\text{tube}}{\to }\text{B}\underset{{\text{AlCl}}_{\text{3}}}{\overset{{\text{CH}}_{\text{3}}\text{Cl}\text{(1}\text{eq}\text{.)}}{\to }}\text{C}$
($\text{A}$ is a lowest molecular weight alkyne)

The major product obtained in the given reaction is:

Among the following, the reaction that proceeds through an electrophilic substitution, is:

In the following reactions

$\mathrm{X}$ and $\mathrm{Y}$, respectively, are:

The major product of the following reaction is: