Identify $o-$cresol $(A)$,catechol $(B)$,Phenetole $(C)$ and resorcinol $(D)$ from the following structures labeled $a, b, c, d$ and $e$.

In the carbinol system,$sec$-Butyl alcohol is named as:

Match the items in Column-$I$ with the appropriate items in Column-$II$.

Column-$I$	Column-$II$
$(A)$ One or more hydroxyl $(-OH)$ groups are directly attached to the carbon of an aliphatic system.	$(1)$ Water
$(B)$ $-OH$ group is directly attached to the carbon of an aromatic system.	$(2)$ Phenol
$(C)$ Alkyl or aryl group replaces the $H$ of the $-OH$ group of alcohol or phenol.	$(3)$ Ether
$(D)$ Hydrogen replaces the $-R$ group of alcohol.	$(4)$ Alcohol
	$(5)$ None

$Crotonyl$ alcohol is an example of

Which of the following hydroxy compounds contains only one $-OH$ group in a molecule?

The correct combination of names for isomeric alcohols with molecular formula $C_4H_{10}O$ is/are:
$A$. tert-butanol and $2$-methylpropan$-2$-ol
$B$. tert-butanol and $1,1$-dimethylethan$-1$-ol
$C$. $n$-butanol and butan$-1$-ol
$D$. isobutyl alcohol and $2$-methylpropan$-1$-ol