The major organic compound formed by the reaction of 1, 1, 1 - trichloroethane with silver powder is :

The major product of the following reaction is :

The major product formed in the following reaction is :

${\mathrm{CH}}_3\mathrm{CH}=\mathrm{CHCH}{\left({\mathrm{CH}}_3\right)}_2\stackrel{\mathrm{HBr}}{\to }$

In the following reaction sequence the major products $\mathrm{A}$ and $\mathrm{B}$ are :

The major product $\left[\mathrm{R}\right]$ in the following sequence of reaction is :

The major product $\left[\mathrm{C}\right]$ of the following reaction sequence will be :