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General Knowledge Easy NTS Uploaded: 02 Sep 2026

Which gas do humans exhale in the largest quantity relative to inhaled air?

  • A Carbon dioxide
  • B Oxygen
  • C Nitrogen
  • D Hydrogen
Correct Answer: Option A — Carbon dioxide
Explanation:
Humans exhale a higher concentration of carbon dioxide than they inhale, a byproduct of cellular respiration.
Submitted by: PaperMCQs
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