Which one of the following alkenes will react faster with H_2 under...

Due to steric hinderence, hyperconjugation and heat of hydrogenation, reactivity of alkenes can be shown as:$$\begin{aligned}& \mathrm{H}_{2} \mathrm{C}=\mathrm{CH}_{2}>\mathrm{R}-\mathrm{CH}=\mathrm{CH}_{2}> \\ & \mathrm{R}-\mathrm{CH}=\mathrm{CH}-\mathrm{R}> \mathrm{R}_{2} \mathrm{C}=\mathrm{CH}_{2}> \\ & \mathrm{R}_{2} \mathrm{C}=\mathrm{CHR}>\mathrm{R}_{2} \mathrm{C}=\mathrm{CR}_{2} . \end{aligned}$$Related Theory The relative rates of hydrogenation decrease with the increase of steric hindrance. In order of stability of alkene, most stable the alkene slowly it gives the product.