This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: A.N.S., Subject name: Pharmacology
[{'content': 'A patient came to the casualty with acute bronchial asthma after treatment for glaucoma. The probable drug may be: \nSelect and explain. \nA. Timolol, B. Betaxolol, C. Latanoprost, D. Anticholinesterase', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. (A) Timolol(Ref KDT 8th/e p167)Timolol is a non-selective beta blocker and can precipitate acute attacks of asthma in a susceptible individual via blockade of b2 receptors. Betaxolol is a cardioselective beta blocker and is less likely to cause this adverse effect.', 'role': 'assistant'}]