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    Question

    Which of the following is the ratio of Oxygen to

    Nitrogen in the air?
    A 1 : 4 Correct Answer Incorrect Answer
    B 2 : 3 Correct Answer Incorrect Answer
    C 3 : 2 Correct Answer Incorrect Answer
    D 4 : 1 Correct Answer Incorrect Answer

    Solution

    The correct answer is A

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