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': 'A 55 year old female comes to the eye casualty with history of severe eye pain, redness and diminished vision. On examination, the visual acuity is 6/60, there is circumcorneal congestion, corneal oedema and a shallow anterior chamber. Which of the following is the best drug of choice – \nSelect and explain. \nA. Atropine ointment, B. IV mannitol, C. Ciprofloxacin eye drops, D. Betamethasone eye drops', 'role': 'user'}, {'content': 'Answer: B \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.', 'role': 'assistant'}]