Question

Five chemical factories $P,Q,R,SandT$ are located in different cities along a river bank. Municipal officer, in order to estimate the pollution caused by these factories, counted the number of fishes present at the places where these factories discharged their wastes into the river. A graph as shown here, is plotted based on the observations.
What can be inferred from the graph ?

• A. Factory $R$ dumps the least toxic wastes in the river.
• B. Factory $P$ dumps its waste into river after removing toxic wastes.
• C. Fishes are maximally harmed by the toxic wastes of factory $Q$.
• D. Factory $T$ dumps the most toxic wastes in the river.

Answer 1

The correct option is D Factory $T$ dumps the most toxic wastes in the river.

Because the number of fishes present in the river where factory $T$ dump the waste is less than any other so factory $T$ dumps the most toxic wastes in the river.
Hence option $D$ is answer.