This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Vitreous and retina, Subject name: Ophthalmology
[{'content': 'Commonest type of Retinal detachment - \nSelect and explain. \nA. Rheugmatogenous, B. Choroidal hemorrhage, C. Exudative, D. Tractional', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Rhegmatogenous retinal detachment usually associated with a retinal break (hole or tear) through which subretinal fluid (SRF) seeps and separates the sensory retina from the pigmentary epithelium. This is the commonest type of retinal detachment. Ref khurana 6/e p 299', 'role': 'assistant'}]