This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Glaucoma, Subject name: Ophthalmology
[{'content': 'Argon Laser trabeculoplasty is used in - \nSelect and explain. \nA. Open angle glaucoma, B. Angle closure glaucoma, C. Buphthalmos, D. None', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Open angle glaucomaOpen angle glaucoma* Treatment of choice- topical antiglaucoma drugs* Drug of choice - Beta blocker (timolol)* Surgery of choice - Argon or Diode laser trabeculoplasty", 'role': 'assistant'}]