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