BOD stands for biochemical oxygen:
ADeficit
BDensity
CDosage
DDemand
Answer & Solution
Correct answer: D. Demand
1. It measures how much oxygen bacteria would use.
2. The measure is a requirement, not a shortage.
3. So BOD is biochemical oxygen demand.
4. The answer is demand.
_Source: NCERT Class 12 Biology, Ch 8 'Microbes in Human Welfare'_
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