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  Consider the following statements:

1. Clouds generally reflects some of the sunlight in different directions and the rest is absorbed.

2. Nearly 90% of the water vapour lies below 12 km of the atmosphere.

3. Water vapour does not exceed 3 percent to 4 percent of total volume of air.

4. Nitrogen serves mainly as dilutant and dissolver.

Which of the above statements is/are not correct?

A)  1 and 2    

B)    2 and 3

C)  3 only                       

D)    3 and 4