Dew point of an air-water vapor mixture

Question: Dew point of an air-water vapor mixture
[A].

decreases with decrease in pressure.

[B].

at constant humidity & total pressure is fixed.

[C].

corresponding to any point on the humidity chart is obtained by projecting a line through this point parallel to the temperature axis and to the saturation curve.

[D].

all ‘a’, ‘b’ & ‘c’.

Answer: Option D

Explanation:

No answer description available for this question.