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Discussion :: Environmental Science

  1. A high Biological Oxygen Demand (BOD) indicates that:

    2. A.

     water is pure
    B.

     absence of microbial action
    C.

     Low level of microbial pollution
    D.

     High level of microbial pollution

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    Answer : Option D

    Explanation :

    A high BOD indicates the presence of a large number of microorganisms, which suggests a high level of pollution.

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