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 – \nSelect and explain. \nA. Homatropine mydratic test, B. Mydriatic – miotic test, C. Water drinking test, D. Dark room test', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Two provocative tests have been described for prodromal stage (latent POAG) i) Prone-darkroom provocative test is the most popular and best physiological provocative test; ii) Mydriatic provocative test (not physiological).', 'role': 'assistant'}]