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': 'Which is a direct branch of arch of aoa? \nSelect and explain. \nA. Right subclan aery, B. Right common carotid aery, C. Brachiocephalic trunk, D. Right coronary aery', 'role': 'user'}, {'content': 'Answer: C \nExplanation: This is indirect repeat from previous sessions. See explanation-6 of session-9.', 'role': 'assistant'}]