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: Pharmacology
[{'content': 'Pilocarpine reduce the intraocular pressure in persons with closed angle glaucoma by: \nSelect and explain. \nA. Reducing aqueous humor secretion, B. Contracting iris sphincter muscle, C. Increasing aqueous humor outflow, D. Relaxing ciliary muscle', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]