1.

What is B.O.D.?

A.  The amount of \[{{O}_{2}}\] utilized by organisms in water
B.  The amount of \[{{O}_{2}}\] utilized by micro-organisms for decomposition
C. The total amount of \[{{O}_{2}}\] present in water
D.  All of the above.
Answer» C. The total amount of \[{{O}_{2}}\] present in water


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