Water pollution is less if `BOD` is

Less proportion of BOD in water is proportional to...? (A) Proportion of water pollution is more (B) Proportion of water pollution is less (C) Quantity of organic substances is more (D) Water is not considered potable

[A] : Population density of indicator organisms show degree of water pollution . [R] : BOD is an index of organic waste in water .

[A] : Population density of indicator organisms show degree of water pollution . [R] : BOD is an index of organic waste in water .

[A] : Population density of indicator organisms show degree of water pollution . [R] : BOD is an index of organic waste in water .

[A] : Population density of indicator organisms show degree of water pollution . [R] : BOD is an index of organic waste in water .

The manner in which values of BOD and COD change, as water pollution increases in a stream

Assertion: Water pollutants are measured by BOD. Reason: If BOD is more, the water is polluted.

How do organic substances cause water pollution ? Explain the term C.O.D. and B.O.D.

Greater the BOD of sewage water, its polluting ability is: