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': 'Ratio of diameter of retinal aeriole to retinal venule is - \nSelect and explain. \nA. 3:02, B. 2:03, C. 3:01, D. 1:03', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Answer- B. 2:3The ratio has been normally regarded as 2 : 3', 'role': 'assistant'}]