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    4. Biochemistry
    5. The gas usually causing explosions in coal mines is-

    Question

    The gas usually causing explosions in coal mines is-

    A Hydrogen Correct Answer Incorrect Answer
    B Carbon monoxide Correct Answer Incorrect Answer
    C Air Correct Answer Incorrect Answer
    D Methane Correct Answer Incorrect Answer

    Solution

    The correct answer is D

    Practice Next
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