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    Question

    The presence of Escherichia coli in water in high amount

    is a strong indication of
    A Industrial pollution Correct Answer Incorrect Answer
    B Sewage or animal waste contamination Correct Answer Incorrect Answer
    C Hardness of water Correct Answer Incorrect Answer
    D Presence of chlorine in Correct Answer Incorrect Answer

    Solution

    Escherichia coli is a bacterium commonly found in the intestines of warm-blooded animals, including humans. Its presence in water is an indicator of fecal contamination, typically from sewage or animal waste. High amounts of E. coli in water suggest the potential presence of harmful pathogens and indicate a risk to human health if the water is consumed or used for recreational purposes.

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