This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pelvis, 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: Ans. is 'b' i.e., Sciatic nerve o Sciatic nerve leaves the pelvis and runs posteriorly in the thigh.o In the upper angle of popliteal fossa, sciatic nerve divides into tibial nerve and common peroneal nerve", 'role': 'assistant'}]