Q. In the atmosphere of Earth, the percentage of oxygen is:

  • (A) 21%
  • (B) 30%
  • (C) 17%
  • (D) 42%
✅ Correct Answer: (A) 21%

Published by Yami Thakur ⭐ 10.63K Points at 17-Jul-2023 06:47 am in Geography

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