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General Knowledge Medium PMS Uploaded: 02 Sep 2026

What is the main gas responsible for the greenhouse effect?

  • A Oxygen
  • B Carbon dioxide
  • C Nitrogen
  • D Helium
Correct Answer: Option B — Carbon dioxide
Explanation:
Carbon dioxide traps heat in the atmosphere, making it a primary contributor to the greenhouse effect.
Submitted by: PaperMCQs
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