1.

Which of the following is a sink for `CO`?A. HaemoglobinB. Microorganisms present in the soilC. OceansD. Plants

Answer» Correct Answer - B
Microorganisms present in the soil act as biggest source nad sink. A sink as a natural or artificial reservior that accumulates and stores some chemical compound for an indefinite period. Thus (b) is correct option.


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