Q. With reference to effect of green house gases, Which of the following is/are true?
1. Changes to plant growth and nutrition levels
2. Ozone depletion
3. Smog pollution
Select the correct answer from the following codes
A. a.Only 1
B. b. Only 1 and 2
C. c. Only 2 and 3
D. d. 1,2 and 3
Answer: 1,2 and 3
