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
[{'content': 'Mass treatment of trachoma is undeaken if prevalence of trachoma in community is more than: \nSelect and explain. \nA. >1 %, B. >5%, C. >7.5%, D. >10%', 'role': 'user'}, {'content': 'Answer: B \nExplanation: A prevalence of >5% severe and moderate trachoma in children under 10 years is an indication of mass treatment in case of trachoma. Ref: Park 21st edition, page 283.', 'role': 'assistant'}]