Distillation

Let’s evaluate each mixture and its appropriate method of separation:
- A. CHCl + C H NH (Chloroform and Aniline): Chloroform and aniline can be separated by fractional distillation, as they have different boiling points.
Thus, A-III.

- B. Crude oil + petroleum industry: The components in crude oil can be separated by simple distillation based on their boiling points. This is a typical method used in the petroleum industry.
Thus, B-IV.
- C. Glycerol from spent-lye: Glycerol can be separated from spent-lye by steam distillation, a method used to separate water-soluble organic compounds.
Thus, C-II.
- D. Aniline + water: Aniline and water can be separated by distillation under reduced pressure, as aniline has a much higher boiling point than water. This method helps in separating components with large differences in boiling points.
Thus, D-I.

Thus, the correct answer is (3) A-III, B-IV, C-II, D-I.