Which of the following is the major product,when $p$-cresol is treated with zinc dust?

When a mixture of vapours of phenol and hydrogen is passed over nickel catalyst at $433 \ K$,the product obtained is

The reaction sequence is as follows:
$Catechol \xrightarrow{(i) CHCl_3 + KOH}{(ii) CH_2I_2 + NaOH} [X]$
Here $[X]$ is:

Out of the compounds below,the vapour pressure of $(B)$ at a particular temperature is:

What are $X$ and $Y$ in the following reactions?

What are $X$ and $Y$ respectively in the following reaction sequence?
$C_6H_5N_2^+X^-$ $\xrightarrow{C_2H_5OH} X$ $\xrightarrow[\text{anhy. } AlCl_3]{CO, HCl} Y$