Match the compounds in Column-$I$ with their major dehydration products in Column-$II$.

Column-$I$ (Compound)	Column-$II$ (Major Product)
$A$. $1$-Methylcyclohexanol	$i$. $1$-Methylcyclohexene
$B$. Butan-$1$-ol	$ii$. But-$1$-ene
$C$. tert-Butyl alcohol	$iii$. Isobutylene
$D$. Butan-$2$-ol	$iv$. But-$2$-ene

(A-III, B-II, C-I, D-IV) The dehydration of alcohols follows the $E1$ or $E2$ mechanism,typically yielding the most stable alkene (Saytzeff's rule).
$A$. $1$-Methylcyclohexanol dehydrates to form $1$-methylcyclohexene $(iii)$.
$B$. Butan-$1$-ol dehydrates to form but-$1$-ene $(ii)$.
$C$. tert-Butyl alcohol ($2$-methylpropan$-2-$ol) dehydrates to form isobutylene $(i)$.
$D$. Butan-$2$-ol dehydrates to form but-$2$-ene as the major product $(iv)$.
Therefore,the correct matching is: $A-iii, B-ii, C-i, D-iv$.