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': 'Shifting fluid is pathognomonic of: \nSelect and explain. \nA. Solid retinal detachment, B. Rhegmatogenous retinal detachment, C. Tractional retinal detachment, D. Choroidal detachment', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. Solid retinal detachment', 'role': 'assistant'}]