Propene on reaction with $\mathrm{N}$-bromosuccinimide in ${\mathrm{CCl}}_4$ produces-

Which one of the following alkenes will react faster with ${\mathrm{H}}_2$ under catalytic hydrogenation conditions?

($\mathrm{R}=$ Alkyl substituent)

Arrange the following in order of increase/decrease in boiling point.

$\begin{array}{c}{\mathrm{CH}}_3{\mathrm{CH}}_2{\mathrm{CH}}_2{\mathrm{CH}}_2{\mathrm{CH}}_3\\ \mathrm{I}\end{array}$  $\begin{array}{c}{\left({\mathrm{CH}}_3\right)}_2{\mathrm{CHCH}}_2{\mathrm{CH}}_3\\ \mathrm{II}\end{array}$ $\begin{array}{c}{\left({\mathrm{CH}}_3\right)}_4\mathrm{C}\\ \mathrm{III}\end{array}$   

$\mathrm{A},\mathrm{B}$ and $\mathrm{C}$ are:

Hence $\mathrm{A}$ is: