How will you separate a mixture of two organic compounds which have different solubilities in the same solvent?

$A$ mixture of three compounds $A, B, C$ is passed through a column of $Al_2O_3$ by using alcohol as eluant. The order in which they are eluted out of the column is $C, B, A$. Which of the following statements is true?

Explain the principle of paper chromatography.

Explain the sublimation technique used for the purification of organic compounds.

Describe the use of a separatory funnel in the extraction of an organic compound.

The organic compound which can be purified by steam distillation is