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': 'Anterior spinal artery is a branch of \nSelect and explain. \nA. Internal carotid artery, B. Basilar artery, C. Vertebral artery, D. Labyrinthine artery', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]