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': '7yr old girl, injury to nerve which passes superior- to piriformis & winds around greater sciatic notch. Most likely muscle affected - \nSelect and explain. \nA. Gluteus medius, B. Gluteus maximus, C. Obturator internus, D. Piriformis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Structures passing through greater sciatic foramen.\nPiriformis\nAbove Piriformis\n\nSuperior gluteal nerve and vessels\n\nBelow Piriformis\n\nInferior gluteal nerve and vessels\nSciatic nerve\nPosterior cutaneous nerve of thigh\nNerve to quadratus femoris\nPudendal nerve\nInternal pudendal vessels\nNerve to obturator internus\n\nSuperior gluteal nerve supplies gluteus medius and gluteus minimus.', 'role': 'assistant'}]