Cyclohexanone is subjected to reduction by ${\mathrm{NaBH}}_4$. The product formed is

This gives which isotopic product?

 $\mathrm{X} \& \mathrm{Y}$ respectively is -

Consider following reactions:

$\mathrm{Ph}-\mathrm{OH}\stackrel{\mathrm{Na}\text{ metal }}{\to }\text{ Gas }\mathrm{A}$

$\mathrm{Ph}-\stackrel{\mathrm{O}}{\stackrel{\left|\right|}{\mathrm{C}}}-\mathrm{OH}\stackrel{{\mathrm{NaHCO}}_{\mathrm{3}}}{\to }\text{Gas} \mathrm{B}$

The sum of molecular masses of gas $\mathrm{A}$ and $\mathrm{B}$ will be equal to:

The product is

For the above sequence of reactions, identify the correct statements.
(a) $\mathrm{A}$ has more $\mathrm{pKa}$ than $\mathrm{D}$.
(b) $\mathrm{B}$ can be prepared by the deamination of m-toluidine.
(c) $\mathrm{A}$ and $\mathrm{D}$ show HVZ reaction.
(d) $\mathrm{A}$ can be prepared from $\mathrm{D}$ by reduction with ${\mathrm{H}}_2, {\mathrm{CuCr}}_2{\mathrm{O}}_4$.