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    3. Chemistry Science
    4. Organic chemistry
    5. Of the following which one pollutes the air of abig city? 

    Question

    Of the following which one pollutes the air of abig

    city? 
    A Copper Correct Answer Incorrect Answer
    B Chromium Correct Answer Incorrect Answer
    C Lead Correct Answer Incorrect Answer
    D Calcium Correct Answer Incorrect Answer

    Solution

    The correct answer is C

    Practice Next
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