Question

Which among the following organisms is known as polluted water indicator?

• A. Tubifex
• B. E.coli
• C. Chironomus larvae
• D. All of the above

Answer 1

The correct option is D All of the above

Water pollution is the major cause of several chronic diseases. The potable water must be treated to get rid of certain harmful microorganism. Daphnia, trout fishes, and larvae of stone flies are the example of fresh water indicator and tubifex, E. Coli, sewage fungus, sludge worms, blood worms are the indicator of polluted water.

So, the correct answer is option D.