By the crystallisation of an impure compound,if the mother liquor becomes coloured,what shall be done to remove the colour?

Given below are two statements: One is labelled as Assertion $A$ and the other is labelled as Reason $R$.
Assertion $A$: Thin layer chromatography is an adsorption chromatography.
Reason $R$: $A$ thin layer of silica gel is spread over a glass plate of suitable size in thin layer chromatography which acts as an adsorbent.
In the light of the above statements,choose the correct answer from the options given below.

To separate different fractions of crude oil in the petroleum industry,the method used is:

Match List-$I$ with List-$II$:

List-$I$ (Separation of)	List-$II$ (Separation Technique)
$A$. Aniline from aniline$-water$ mixture	$I$. Simple distillation
$B$. Glycerol from spent$-lye$ in soap industry	$II$. Fractional distillation
$C$. Different fractions of crude oil in petroleum industry	$III$. Distillation at reduced pressure
$D$. Chloroform$-Aniline$ mixture	$IV$. Steam distillation

Choose the correct answer from the options given below:

Which type of solvent is added to an aqueous solution in the differential extraction method?

What criterion is followed for the selection of the stationary phase in chromatography?