Biochemical oxygen demand $(BOD)$ value can be a measure of water pollution caused by organic matter. Which of the following statements is correct?

  • A
    Polluted water has $BOD$ value higher than $10 \ ppm$
  • B
    Aerobic bacteria decreases the $BOD$ value
  • C
    Anaerobic bacteria increases the $BOD$ value
  • D
    Clean water has $BOD$ value higher than $10 \ ppm$

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