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

  • question_answer
    Which one of the following statements is correct?

    A) Trees take in oxygen and emit carbon dioxide into the environment

    B) Trees take in water and emit carbon dioxide into environment

    C) Trees take in carbon dioxide and emit oxygen into the environment

    D) All of these

    E) None of these

    Correct Answer: C


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