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': 'Commonest type of retinal detachment: \nSelect and explain. \nA. Rheugmatogenous, B. Choroidal haemorrhage, C. Exudative, D. Tractional', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. Rheugmatogenous', 'role': 'assistant'}]