This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Thorax, Subject name: Anatomy
[{'content': 'Not a direct branch of aoa \nSelect and explain. \nA. Left common carotid aery, B. Left subclan aery, C. Brachiocephalic trunk, D. Right common carotid aery', 'role': 'user'}, {'content': 'Answer: D \nExplanation: ARCH OF AOA BRANCHES Arch of aoa is the continuation of the ascending aoa.It is situated in the superior mediastinum behind the lower half of the manubrium sterni. BRANCHES 1.Brachiocephalic aery which divides into the right common carotid and right subclan aeries. 2.Left common carotid aery 3.Left suclan aery REF.BDC VOL.1,FIFTH EDITION', 'role': 'assistant'}]