Pick out the wrong statement ?

A. A horizontal line on the humidity chart indicates the temperature changes at constant molal
humidity
B. When water is cooled from 80 to 70°C by exposure to the air with a wet bulb temperature of
60°C, then both the approach & the range would be 10°C
C. For unsaturated air-water vapor mixture at atmospheric conditions, the wet bulb temperature
& adiabatic cooling lines are the same
D. Relative saturation of unsaturated mixture of water vapor & air cannot be increased by either
reducing the mixture temperature or by increasing the total pressure