Teaching BPSC बिहार माध्यमिक TGT (9 to 10) शिक्षक भर्ती 4.0 Mock Test General Science Biology Biology in Everyday life
High Biological oxygen demand (BOD) in a water body indicates
1
Decrease in the dissolved oxygen
2
Increase in the dissolved oxygen
3
Oxygen level remains unaffected
4
More than one of the above
5
None of the above