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 coronal pulp has \nSelect and explain. \nA. Two surfaces, B. Five surfaces, C. Six surfaces, D. Four surfaces', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]