Water polluted by various human activities causes a number of water-borne diseases. Which of the following is not a water-borne disease?
  1. Cholera
  2. Typhoid
  3. Asthma
  4. Dysentry

Correct Answer: (c) Asthma

Explanation: Asthma is an air-borne respiratory disease. It is caused due to an allergy to dust, pollen grains or any other allergen present in air.


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