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  2. Questions Bank
  3. 6th Class
  4. Science
  5. The Living Organisms and their Surrounding

6th Class Science The Living Organisms and their Surrounding Question Bank Environment

  • question_answer
    About one-fifth of air is _____.

    A) Nitrogen            

    B) Oxygen

    C) Argon                           

    D) Helium

    E) None of these

    Correct Answer: B

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