The $BOD$ values for pure water and highly polluted water are respectively
- A$> 5 \ ppm, \ \leq 17 \ ppm$
- B$> 5 \ ppm, \ \geq 17 \ ppm$
- C$< 5 \ ppm, \ \geq 17 \ ppm$
- D$< 5 \ ppm, \ \leq 17 \ ppm$
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