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': "All are seen in stage III trachoma except: \nSelect and explain. \nA. Tarsal epitheliofibrosis, B. Trachomatous pannus, C. Herbe's pits, D. Disappearance of Bowman's membrane", 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. Trachomatous pannus', 'role': 'assistant'}]