Which of the following is a means of water disinfection?
A) Cholera
B) Chlorine
C) Turbidity
D) Pathogen
Answer: B
Explanation: A) Incorrect. Cholera is a biological contaminant.
B) Correct. Chlorine is a means of disinfecting water.
C) Incorrect. Turbidity is cloudiness in water.
D) Incorrect. Pathogen is a disease causing microorganism.
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