Match the List-I with List-II

List – I

Expression for water in atmosphere

List - II

Units

A.
Volume mixing Ratio
I.
g H₂O (m³ Air)^-1

B.
Mass mixing Ratio
II.
g H2O (kg air)-1

C.
Specific humidity
III.
parts per million (ppm)

D.
Mass concentration
IV.
g H2O (g air)-1

Choose the correct answer from the options given below:

Question

List – I Expression for water in atmosphere		List - II Units
A.	Volume mixing Ratio	I.	g H₂O (m³ Air)^-1
B.	Mass mixing Ratio	II.	g H2O (kg air)-1
C.	Specific humidity	III.	parts per million (ppm)
D.	Mass concentration	IV.	g H2O (g air)-1