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': 'Which leaves the pelvis ? \nSelect and explain. \nA. Piriformis, B. Sciatic nerve, C. Superior gluteal vessel, D. Inferior gluteal vessel', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Sciatic nerve leaves the pelvis and runs posteriorly in the thigh.In the upper angle of popliteal fossa, sciatic nerve divides into tibial nerve and common peroneal nerve', 'role': 'assistant'}]