This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Anatomy
[{'content': 'Right fouh arch aery gives rise to \nSelect and explain. \nA. Right subclan aery, B. Common carotid aery, C. Internal carotid aery, D. External carotid aery', 'role': 'user'}, {'content': 'Answer: A \nExplanation: .', 'role': 'assistant'}]