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': 'Drug kept as a last reso in the management of primary open angle glaucoma is - \nSelect and explain. \nA. Latanoprost, B. Topical beta blocker, C. Brimonidine, D. Oral acetazolamide', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Acetazolamide and methazolamide are not recommended for long term use because of their side effects. However, acetazolamide 250 mg Tds may be added to control IOP for sho term Ref :Ophthalmology A K Khurana 6th edition chapter-10 page no :237', 'role': 'assistant'}]