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': 'Blood supply of femoral head is: \nSelect and explain. \nA. Femoral aery, B. Obturator aery, C. Internal pudendal aery, D. All', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. Obturator aery', 'role': 'assistant'}]