The final product $(III)$ is

Number of isomeric alcohols of molecular formula $C_6H_{14}O$ which give positive iodoform test is

$A$ hydroxy compound $(X)$ with molar mass $122 \ g \ mol^{-1}$ is acetylated with acetic anhydride, using a large excess of the reagent ensuring complete acetylation of all hydroxyl groups. The product obtained has a molar mass of $290 \ g \ mol^{-1}$. The number of hydroxyl groups present in compound $(X)$ is :

At room temperature,the alcohol that does not react with Lucas reagent is:

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

Identify $A$ in the given reaction.