MCQOPTIONS
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| 1. |
Which of the following does NOT allow harmful ultraviolet radiations from the sun to reach the earth? |
| A. | \[{{O}_{2}}\] |
| B. | \[N{{O}_{2}}\] |
| C. | \[C{{O}_{2}}\] |
| D. | \[{{O}_{3}}\] |
| Answer» E. | |