6. The ratio of the actual vapour pressure to the pressure of saturated vapour at the prevailing dry bulb temperature is known as
A. Relative humidity
B. Humidity ratio
C. Specific humidity
D. Vapour humidity
6. The ratio of the actual vapour pressure to the pressure of saturated vapour at the prevailing dry bulb temperature is known as
A. Relative humidity
B. Humidity ratio
C. Specific humidity
D. Vapour humidity