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': 'Which drug is contraindicated in a glaucoma patient suffering from bronchial asthma: \nSelect and explain. \nA. Timolol maleate, B. Latanoprost, C. Betaxolol, D. Brimonidine', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]