A)
B)
C)
D) None of these
Correct Answer: A
Solution :
In figures (b) and (c), presence of layer of oil and suspended matter interferes with the entry of oxygen into water. Thus, the plants and the fish will not get sufficient oxygen for respiration and will also get badly affected by the chemicals present in oil. They will ultimately die because of suffocation. In figure (a), presence of clear water supplies sufficient amount of oxygen to the organisms and hence, they would survive.
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