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Question

Actual water vapour content of atmosphere is

A
Relative humidity
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B
Differential pressure
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C
Both A and B
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D
Absolute humidity
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Solution

The correct option is A Absolute humidity
Humidity is the amount of water vapour in the air. There are three main measurements of humidity: absolute, relative and specific.
Absolute humidity is the absolute water content of the air.
Relative humidity, expressed as a percent, measures the current absolute humidity relative to the maximum possible for that temperature.
Specific humidity is a ratio of the water vapor content of the mixture to the total air content on a mass basis.
So, the correct answer is 'Absolute humidity'

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