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: Dental
[{'content': 'All of the following are close to median except \nSelect and explain. \nA. 2nd quartile, B. 50th percentile, C. 2nd tertile, D. 5th decile', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]