Identify product $B$ in the following reaction sequence:
$(CH_3)_2C=C(CH_3)_2$ $\xrightarrow{X_2, H_2O} A$ $\xrightarrow{OH^{-}} B$

Sum of number of $1^o$ alcoholic groups in product $(P)$ and $(Q)$ is

Identify the reaction schemes $A, B, C$ for the conversion of vinylcyclohexane to the respective alcohols,given the following methods:
$I-$ Acid-catalyzed hydration
$II-$ Hydroboration-oxidation $(HBO)$
$III-$ Oxymercuration-demercuration

Esterification of the acid $P$ with the alcohol $Q$ will give:

How many metameric ethers are represented by the molecular formula $C_4H_{10}O$?

Match the compounds in Group-$I$ with their uses in Group-$II$. Find the correct match for Group-$I$ from Group-$II$.

Group-$I$ (Compound)	Group-$II$ (Use)
$A$. Alcohol	$1$. Antiseptic
$B$. Phenol	$2$. Perfumes
$C$. Ether	$3$. Detergents
$D$. Amine	$4$. Dyes