Choose the incorrect sentence regarding $BOD$.

  • A
    The amount of dissolved oxygen in water increases, the $BOD$ increases.
  • B
    It is possible to estimate the amount of biodegradable organic matter in sewage water by measuring biochemical oxygen demand $(BOD)$.
  • C
    Micro-organisms involved in biodegradation of organic matter in the receiving water body consume a lot of oxygen and as a result there is a sharp decline in dissolved oxygen downstream from the point of sewage discharge.
  • D
    Decline in dissolved oxygen in water causes mortality of fish and other aquatic creatures.

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