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1. |
*/*_Consider the following statements:1. Nearly 99 percent of the total mass of the atmosphere lies within 30 km of the Earth's surface.2. The proportion of ozone in the atmosphere increases to a maximum at about 60 km from Earth's surface.Which of the statements given above is/are correct?? |
A. | 1only |
B. | 2 only |
C. | Both 1 and 2 |
D. | Neither 1 nor 2 |
Answer» B. 2 only | |