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[A] : An estimation of B.O.D gives an in...

[A] : An estimation of B.O.D gives an indication of the amount of pollution in a body of water .
[R] : B.O.D is measure of the oxygen requirements of the bacteria , which are living in the water .

A

If both A and R are true and R is the correct explanation of A

B

If both A and R are true but R is not the correct explanation of A

C

If A is true and R is false

D

If both A and R are false

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B.O.D. is connected with

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Assertion: BOD indicates the extent of water pollution by organic wastes. Reason: Increase in BOD decreases dissolved oxygen of wastewater.

A water body has high BOD indicating that water is

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

What is the importance of measuring BOD of a water body ?

Statement-1: Water is polluted by organic wastes and Statement-2: The amount of organic wastes is measured by the BOD.

The greater BOD ( biochemical oxygen demand) of waste water indicates.

BOD of waste water is estimated by measuring the amount of

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