A mixture of three liquids X, Y and Z when subject to fractional distillation, the order in which the vapours condense back to liquid state in fractioning towers is Y, X and Z. Arrange them in the correct order of vapour pressures.

Options

A. `Z lt X lt Y`
B. `Y lt X lt Z`
C. `X lt Y lt Z`
D. `X lt Y lt Z`

Explanation

To solve the problem of arranging the liquids X, Y, and Z in order of their vapor pressures based on the results of fractional distillation, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Fractional Distillation**:
- Fractional distillation separates components of a mixture based on their boiling points. The liquid with the lowest boiling point (or highest vapor pressure) vaporizes first and condenses back into a liquid at the top of the fractionating tower.

2. **Analyzing the Order of Condensation**:
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