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': 'Follicles of a diameter of 5 mm are typically seen in: \nSelect and explain. \nA. Pharyngoconjunctival fever, B. Trachoma, C. Drug induced follicular conjunctivitis, D. Ophthalmia neonatorum', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. Trachoma', 'role': 'assistant'}]