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8th Class Science Coal and Petroleum Question Bank Coal and Petroleum

  • question_answer
    Which of the following is most harmful for the human body?                

    A)                  \[CO\]                                 

    B)                        \[C{{O}_{2}}\]                

    C)                  Oxides of nitrogen                        

    D)                  Lead compounds

    Correct Answer: A

    Solution :

                    Carbon monoxide is the most harmful substance for the human body.                


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