What are $X$ and $Y$ respectively in the following reaction sequence?
Isopentane $\xrightarrow{KMnO_4} X$ $\xrightarrow{\text{dehydration}} \underset{\text{Major}}{Y}$

• A
  $X$ = $2-$methylbutan$-2-$ol,$Y$ = $2-$methylbut$-2-$ene
• B
  $X$ = $3-$methylbutan$-2-$ol,$Y$ = $2-$methylbut$-2-$ene
• C
  $X$ = $2-$methylbutan$-2-$ol,$Y$ = $2-$methylbut$-1-$ene
• D
  $X$ = $3-$methylbutan$-2-$ol,$Y$ = $3-$methylbut$-1-$ene