Match List I with List II.

List I	List II
A. van't Hoff factor, i	I. Cryoscopic constant
B. k$$_f$$	II. Isotonic solutions
C. Solutions with same osmotic pressure	III. $$\frac{\text{Normal molar mass}}{\text{Abnormal molar mass}}$$
D. Azeotropes	IV. Solutions with same composition of vapour above it

Choose the correct answer from the options given below:

We need to match List I with List II for concepts related to solutions.

A. van't Hoff factor, $$i$$:

The van't Hoff factor is defined as:

$$i = \frac{\text{Normal molar mass}}{\text{Abnormal molar mass}}$$

This matches with III.

B. $$K_f$$:

$$K_f$$ is the cryoscopic constant (molal depression constant for freezing point).

This matches with I.

C. Solutions with same osmotic pressure:

Solutions having the same osmotic pressure are called isotonic solutions.

This matches with II.

D. Azeotropes:

Azeotropes are solutions that have the same composition in the liquid and vapour phase. They boil at a constant temperature and the vapour has the same composition as the liquid.

This matches with IV (solutions with same composition of vapour above it).

The correct answer is Option A: A-III, B-I, C-II, D-IV.