1.

Gases commonly referred as greenhouse gases are : 1. 2. 3. CFC  4. Which of the above is/are correct?

A.  1 and 4           
B.  2 and 3
C.  1, 2 and 3                    
D.  1, 2, 3 and 4
Answer» D.  1, 2, 3 and 4


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