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: Anatomy
[{'content': '0 \nSelect and explain. \nA. 0, B. 0, C. 0, D. 0', 'role': 'user'}, {'content': 'Answer: A \nExplanation: 0', 'role': 'assistant'}]