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': 'All of the following agents are used in glaucoma treatment, except \nSelect and explain. \nA. Apraclonidine, B. Timolol, C. Pilocarpine, D. Metoprolol', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ref:KD Tripathi 7th edition (page.no: 127,144,153) Katzung 10/e p103 metoprolol is b1 selective blocker, so it can't be used for glaucoma. b2 receptor is present in the eye. so drugs acting on beta 2 should be given. Other drugs used for glaucoma are- b blocker- Timolol,Betaxolol, a agonist ; Apraclonidine,Brimonidine, PG analogue ; Latanoprost ,Bimatoprost, Carbonic anhydrase inhibitors ; acetazolamide ,Dorzolamide, Miotics; Pilocarpine", 'role': 'assistant'}]