question_answer

Examine the following statements and select the correct answer using the codes given below:

1. The atmospheric air is never completely dry.

2. Water vapour can occupy as much as 4 per cent of the atmospheric volume.

3. Water vapour in the atmosphere is always invisible.

A)  1 and 2 are correct

B)  2 and 3 are correct

C)  1 and 3 are correct

D)  1, 2 and 3 are correct