Colligative properties are observed under which of the following conditions:
| (a) | A non-volatile solid is dissolved in a volatile liquid |
| (b) | A non-volatile liquid is dissolved in another volatile liquid |
| (c) | A gas is dissolved in a non-volatile liquid |
| (d) | A volatile liquid is dissolved in another volatile liquid |
1. a and b
2. b and c
3. c and d
4. a and d
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