This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Primary Open-Angle Glaucoma and Related Conditions, Subject name: Ophthalmology
[{'content': 'Which of the following 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: Ans. (a) Timolol maleateRef: A.K. Khurana 6th ed. 1236-37* Although timolol is considered as DOC for OAG in India, it is contraindicated in glaucoma patients suffering from bronchial asthma.* Timolol is a non selective Beta blocker which might aggravate the asthma of the patient.* For such patient Betaxolol is next best choice.', 'role': 'assistant'}]