This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Autonomic nervous system, Subject name: Pharmacology
[{'content': 'A patient came to casualty for acute bronchial asthma after treatment for glaucoma. The probable drug may be \nSelect and explain. \nA. Timolol, B. Betoxalol, C. Lantanoprost, D. Anticholinesterase', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Timolol is a non selective Beta blocker and can precipitate acute attacks of asthma in a susceptible individual blockade of Beta 2 receptors. Betaxolol is a cardioselective Beta blocker and is less likely to cause this adverse side effect Refer kDT 6/e p 139', 'role': 'assistant'}]