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': 'The total number of cingula in each dentition is: \nSelect and explain. \nA. 6, B. 12, C. 24, D. 32', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]