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 perineurium and epineurium of the pulpal nerves are, respectively \nSelect and explain. \nA. Thick and thin, B. Thin and thick, C. Both thin, D. Both thick', 'role': 'user'}, {'content': 'Answer: C \nExplanation: The perineurium and the epineurium of the pulpal nerves are thin.', 'role': 'assistant'}]