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
Shifting fluid is pathognomonic of: 
Select and explain. 
A. Solid retinal detachment, B. Rhegmatogenous retinal detachment, C. Tractional retinal detachment, D. Choroidal detachment
A: Solid retinal detachment
Answer: A: Solid retinal detachment 
Explanation: Ans. Solid retinal detachment