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 52yrs old female presented with sudden attack of painful diminsion of vision in right eye along with coloured halos and vomiting following a movie in a theater . On examination , the eye was stony hard.1st drug to be given in the above condition is \nSelect and explain. \nA. Mannitol, B. Latanoprost, C. Pilocarpine, D. Acetazolamide', 'role': 'user'}, {'content': 'Answer: D \nExplanation: 1st drug to be given in Acute attack of primary Angle Closure glaucoma is i. v Acetazolamide.', 'role': 'assistant'}]