question_answer

Relative humidity is the ratio of the

A)  Amount of water vapour actually present in the air at a particular temperature to the amount of water vapour required to saturate the same air at the same temperature. Climatology 1.79

B)  Amount of water vapour actually present in the air to the maximum water vapour which can be held in the same water at the same temperature.

C)  Weight of moist air to that of dry air.

D)  Volume of moisture to weight of moist air at the same temperature.