BOD is the amount of oxygen:
Correct answer: C. Utilized by micro-organisms for decomposition
- A. Present in water
- B. Utilized by organisms in water
- C. Utilized by micro-organisms for decomposition
- D. Demanded by the producers for the production of food
Explanation
BOD measures the dissolved oxygen consumed by microorganisms while decomposing biodegradable organic matter in water. It therefore indicates the organic pollution load rather than simply the oxygen already present.
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