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': 'The most reliable provocative test for angle-closure glaucoma is: \nSelect and explain. \nA. Homatropine mydriatic test, B. Mydriatic-miotic test, C. Water drinking test, D. Dark room test', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. Dark room test', 'role': 'assistant'}]