Which of these is the most predominant in the composition of atmosphere?

Which of these is the most predominant in the composition of atmosphere?

  • (A) Oxygen
  • (B) Nitrogen
  • (C) Water vapors
  • (D) Carbon dioxide
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Related MCQs:

 ‘NATO’ is an abbreviation of:

  • (A) North Atlantic Treaty Organization
  • (B) Non-Aligned Treaty Organization
  • (C) Non-Aligned Trading Organization
  • (D) North American Transport Organization

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