Visha took 4 text-tubes namely A, B, C & D containing CH_3 CH = CH_2, CH_3 CH_2 CH = CH_2, CH_3 CH = CH - CH_3 and ( CH_3)_2 C = CH_2 respectively…

Visha took $\displaystyle 4$ text-tubes namely $\displaystyle \mathrm{A}, \mathrm{B}, \mathrm{C} \& \mathrm{D}$ containing $\displaystyle \mathrm{CH}_{3} \mathrm{CH}=\mathrm{CH}_{2}$, $\displaystyle \mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}=\mathrm{CH}_{2}, \mathrm{CH}_{3} \mathrm{CH}=\mathrm{CH}-\mathrm{CH}_{3}$ and $\displaystyle \left(\mathrm{CH}_{3}\right)_{2} \mathrm{C}=\mathrm{CH}_{2}$ respectively and tried to convert them into tertbutylalcohol. She carried out acid catalysed hydration reaction on every alkene. Out of the four test-tubes, the one which will give desired result is