Teaching BPSC बिहार प्राथमिक (1 to 5) शिक्षक भर्ती 4.0 Mock Test General Knowledge Ecology and Environment
BOD in reference to water pollution means ________.
1
Biochemical Oxygen Demand
2
Biophysical Oxygen Demand
3
Basic Organic Dissolutes
4
More than one of the above
5
None of the above