Multiple choice general knowledge

Radiocarbon is produced in the atmosphere as a result of

  1. collision between fast neutrons and nitrogen nuclei present in the atmosphere

  2. action of ultraviolet light from the sun on atmospheric oxygen

  3. action of solar radiations particularly cosmic rays on carbon dioxide present in the atmosphere

  4. lightning discharge in atmosphere
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A Correct answer
Explanation

Radiocarbon (carbon-14) is produced in the upper atmosphere when cosmic ray neutrons collide with nitrogen-14 nuclei, causing a nuclear reaction that converts nitrogen-14 to carbon-14. This is a well-documented nuclear physics process. The other options incorrectly attribute it to UV light, solar radiation on CO2, or lightning.

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