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
The mass treatment of trachoma is undertaken if the prevalence in community is - 
Select and explain. 
A. 3%, B. 10%, C. 5%, D. 6%
C: 5%
Answer: C: 5% 
Explanation: None