Q. Which gas is released during respiration?

  • (A) Oxygen
  • (B) Carbon dioxide
  • (C) Nitrogen
  • (D) Hydrogen
✅ Correct Answer: (B) Carbon dioxide
Explanation: CO2 is waste product.

Published by Mr. Dubey ⭐ 111.42K Points at 27-Apr-2026 05:50 am in Biology

Explanation by: Mr. Dubey
CO2 is waste product.

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