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': 'The treatment of choice of angle closure glaucoma is – \nSelect and explain. \nA. Parasympathomimetic drugs, B. Iridectomy, C. Trabeculoplasty, D. Timolol', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]