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Physics - Section 1 :: Discussion
| 1. | 1. Radiocarbon is produced in the atmosphere as a result of | |
| A. | collision between fast neutrons and nitrogen nuclei present in the atmosphere | |
| B. | action of ultraviolet light from the sun on atmospheric oxygen | |
| C. | action of solar radiations particularly cosmic rays on carbon dioxide present in the atmosphere | |
| D. | lightning discharge in atmosphere | |
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