This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Lower limb 1, Subject name: Anatomy
[{'content': 'The blood supply to femoral head is mostly by \nSelect and explain. \nA. Lateral circumflex femoral aery, B. Medial circumflex femoral aery, C. Ligamentum teres aery, D. Obturator aery', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The blood supply of the Femoral Head is derived mainly from retinacular aeries which are the branches of Medial Circumflex Femoral Aery .', 'role': 'assistant'}]