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
A patient came to the casualty with acute bronchial asthma after treatment for glaucoma .the probable drug maybe 
Select and explain. 
A. Timolol, B. Betaxolol, C. Latanoprost, D. Anticholinesterase
A: Timolol
Answer: A: Timolol 
Explanation: Timolol is a non selective Beta blocker and can precipitate acute attacks of asthama in a suitable individual blockade of Beta 2 receptors. Betaxolol is a cardioselective Beta blocker and this less likely to cause this adverse effect Ref-KDT 6/e p139