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': 'Hypophysis cerebri is supplied by \nSelect and explain. \nA. Internal carotid artery., B. External carotid artery., C. Maxillary artery., D. Facial artery.', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]