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      Question

      Nitrogen concentration in the atmosphere

      A 78% Correct Answer Incorrect Answer
      B 50% Correct Answer Incorrect Answer
      C 20% Correct Answer Incorrect Answer
      D 55% Correct Answer Incorrect Answer

      Solution

      N concentration in atmosphere is 78 %, followed by oxygen (21%), Argon (0.93 %), CO2 (0.03 %)

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