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': 'Obturator nerve innervates all of the following muscles except \nSelect and explain. \nA. Adductor longus, B. Pectineus, C. Obturator internus, D. Obturator externus', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Obturator nerve innervates\n-\xa0\xa0\xa0\xa0\xa0\xa0\xa0 Muscular branches\no\xa0\xa0 Anterior division\n\nPectineus\nAdductor longus\nAdductor brevis\nGracillis\n\no\xa0\xa0 Posterior division\n\nObturator externus\nAdductor magnus\n\n-\xa0\xa0\xa0\xa0\xa0\xa0\xa0 Articular branches\no\xa0\xa0 Anterior division\n\nHip joint\n\no\xa0\xa0 Posterior division\n\nKnee joint\n\n-\xa0\xa0\xa0\xa0\xa0\xa0\xa0 Vascular branches\no\xa0\xa0 Anterior division\n\nFemoral artery', 'role': 'assistant'}]