This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Glaucoma, Subject name: Ophthalmology
[{'content': 'Topical drug that can cause Heterochromia Iridis \nSelect and explain. \nA. Timolol, B. Olopatadine, C. Latanoprost, D. Brimonidine', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Latanoprost, a PG analogue can cause heterochromia iridis in patients.', 'role': 'assistant'}]