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': 'In primary open-angle glaucoma pilocarpine eye drops lowers the intraocular pressure by its direct action on the: \nSelect and explain. \nA. Trabecular meshwork, B. Ciliary epithelium, C. Longitudinal fibres of the ciliary muscle, D. All of the above', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. Longitudinal fibres of the ciliary muscle', 'role': 'assistant'}]