This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Ophthalmology
[{'content': 'Earliest drug used in acute angle closure glaucoma – \nSelect and explain. \nA. Diamox, B. Pilocarpine, C. Atropine, D. DFP', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Approach in acute congestive glaucoma \n\nStart i.v. mannitol or i.v. acetazolamide\nWhen IOT starts falling, start topical pilocarpine or β-blocker (timolol).\nApraclonidine/latanoprost may be added.\nOnce i.o.t. is reduced, surgery is done.\nDiamox is acetazolamide', 'role': 'assistant'}]