BiologyWhich of the following is major source of water pollution?  

Which of the following is major source of water pollution?  

  1. A

    Industrial wastes

  2. B

    Untreated sewage

  3. C

    Use of fertilisers

  4. D

    Toxic metals

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    Solution:

    The Correct Answer is Option B i.e. Untreated Sewage
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