This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Social & Preventive Medicine
Strength of chlorine to kill cyclops is – 
Select and explain. 
A. 1 ppm, B. 2 ppm, C. 5 ppm, D. 10 ppm
C: 5 ppm
Answer: C: 5 ppm 
Explanation: None