Multiple choice

Which of the following statements is/are false?

a. Foul-smelling gases are given off due to the decomposition of waste organic matter present in sewage by anaerobic bacteria. b. Open drains are breeding places for mosquitoes and flies that cause diseases. c. Aquatic animals die due to lack of hydrogen that is used by microorganisms decomposing the organic matter.

  1. Only a

  2. Both a and b

  3. Only b

  4. Both b and c

  5. Only c
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

This is the correct option as this statement is false. Aquatic animals die due to lack of oxygen that is used by microorganisms decomposing the organic matter.

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