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    Question

    Global warming is mainly due to increase in

    concentration of
    A COâ‚‚ Correct Answer Incorrect Answer
    B Oâ‚‚ Correct Answer Incorrect Answer
    C NOâ‚‚ Correct Answer Incorrect Answer
    D Hâ‚‚ Correct Answer Incorrect Answer

    Solution

    The correct answer is A

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