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Q. |
The amount of oxygen consumed by the aerobic bacterias which cause the aerobic biological decomposition of sewage, is known |
A. | Bio-Chemical Oxygen Demand (B.O.D.) |
B. | Dissolved Oxygen (D.O.) |
C. | Chemical Oxygen Demand (C.O.D.) |
D. | None of these |
Answer» B. Dissolved Oxygen (D.O.) |
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