On earth the largest reservoir of nitrogen is

Options :
  1. the oceans
  2. granite rocks
  3. the air
  4. the soil
Answer and Explanation :-

Answer: Option 3

Explanation:

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Everyone has the right to doubt everything as often as he pleases and the duty to do it at least once. No way of looking at things is too sacred to be reconsidered. No way of doing things is beyond improvement.
-Edward De Bono Use of Lateral Thinking the