BOD is

A

Biological oxygen deficit

B

Biosphere oxygen demand

C

Biological oxygen demand

D

None of the above

Text Solution

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The correct Answer is:
**Step-by-Step Solution:** 1. **Understanding BOD**: BOD stands for Biological Oxygen Demand. It is a measure of the amount of oxygen that microorganisms will consume while decomposing organic matter in water. 2. **Definition of BOD**: BOD is specifically defined as the amount of oxygen required by aerobic microbes to break down organic matter present in a water sample at a given temperature over a specified period of time. 3. **Importance of BOD**: BOD is an important indicator of water quality and pollution. Higher BOD values indicate a higher level of organic matter in the water, which usually results from pollution sources such as sewage, agricultural runoff, or industrial waste. 4. **Relation to Water Pollution**: The more organic matter present in the water, the more oxygen is required by the aerobic microbes to decompose it. Therefore, a high BOD value signifies a high level of water pollution. 5. **Conclusion**: Among the options provided, the correct answer is "Biological Oxygen Demand". **Final Answer**: Biological Oxygen Demand (BOD). ---
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