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': 'Femoral sheath contains all except \nSelect and explain. \nA. Femoral artery, B. Femoral vein, C. Femoral nerve, D. Lymph node', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]