Common name of ${\mathrm{CH}}_2=\mathrm{CH}-\mathrm{CN}$ is :-
(a) acrylonitrile
(b) vinyl cyanide
(c) allyl cyanide
(d) allyl nitrile

The appropriate reagent for the transformation is

For the reaction

The major product $\left(\mathrm{P}\right)$ is

The conversion

Predict the product $\text{'}\mathrm{B}\text{'}$ in the sequence of reaction

$\mathrm{CH}\equiv \mathrm{CH}\frac{30\%{\mathrm{H}}_2{\mathrm{SO}}_4}{{\mathrm{HgSO}}_4}⟶\mathrm{A}\frac{\text{ dil. }\mathrm{NaOH}}{\approx 10°\mathrm{C}}⟶\mathrm{B}$