The following date pertain to a sewage sample:

Initial D.O. = 10 mg/I

Final D.O. = 2 mg/I

Dilution to 1%

The BOD of the given sewage sample is

- 1
  
  8 mg/I
- 2
  
  10 mg/I
- 3
  
  100 mg/I
- 4
  
  800 mg/I

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