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  3. 4th Class
  4. Science

4th Class Science Sample Paper Science Olympiad Model Test Paper-9

  • question_answer
    Which one of the following is a by-product of photosynthesis?                        

    A) Oxygen

    B) Carbon dioxide

    C) Nitrogen            

    D) Helium

    E)  None of these

    Correct Answer: A

    Solution :

    Not Available  


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