Cyclohexene reacts with limited amount of bromine in the presence of light to form product $\mathrm{X}\left({\mathrm{C}}_6{\mathrm{H}}_9\mathrm{Br}\right).$ The correct statement about $\mathrm{X}$ is 

The 'product' in the above reaction is:

The correct name of the product obtained is:

$3-$Methylpentane on monochlorination gives four possible products. The reaction follows free radical mechanism. The relative reactivities for replacement of $-\mathrm{H}$ are $3°:2°:1°=6:4:1...$ 

Relative amounts of $\mathrm{A}, \mathrm{B}, \mathrm{C}$ and $\mathrm{D}$ formed are:
(A)
(B)
(C)
(D)

Which configuration will be adopted by the product at carbon atoms marked ($1$) and ($2$), respectively, in the given reaction?