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
According to Chandler’s index water containing 200-250 eggs should be considered as 
Select and explain. 
A. Safe, B. Mild pollution, C. Dangerous, D. Public health problem
C: Dangerous
Answer: C: Dangerous 
Explanation: None