Q. With reference to Biochemical Oxygen Demand (BOD) consider the following statements:
1.An increase BOD implies a more rapid depletion of oxygen from the water bodies.
2.BOD refers to the depletion of oxygen in the water bodies due to the increase in the warming of the oceans and absorption of CO2.
Select the correct statements using the codes given below:

[A] 1 only

[B] 2 only

[C] Both 1 and 2

[D] Neither 1 nor 2

Answer: A
Notes:

Explanation –

Statement 1 is correct. An increase BOD implies a more rapid depletion of oxygen from the stream.

Statement 2 is incorrect. Wastewater from sewage treatment plants often contains organic materials that are decomposed by microorganisms, which use oxygen in the process. The amount of oxygen consumed by these organisms in breaking down the waste is known as the biochemical oxygen demand or BOD.

Source: The Hindu