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: Ophthalmology
[{'content': "`S' component of SAFE- \nSelect and explain. \nA. Screening, B. Surgery, C. Steroids, D. None", 'role': 'user'}, {'content': 'Answer: B \nExplanation: SAFE strategy developed by the WHO is the key to the treatment of trachoma. This consists of Surgery (S) on the lids. Antibiotics to treat the community pool of infection (A), Facial cleanliness (F); and Environmental changes (E).', 'role': 'assistant'}]