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Microbes in Human Welfare — BIOLOGY STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 ScienceBIOLOGYMicrobes in Human Welfare1 Mark
MCQ
High biological oxygen demand in a water body means?
  • A
    Water is polluted
  • B
    Water is not polluted
  • C
    Waterbody contains lots of lifeforms
  • D
    None of these
✓

Answer

  1. Water is polluted

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