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': 'All are the branches of arch of aorta except: \nSelect and explain. \nA. Brachiocephalic trunk, B. Right common carotid artery, C. Left common carotid artery, D. Left subclavian artery', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. B. Right common carotid arteryThe aortic arch has three branches. The first, and largest, branch of the arch of the aorta is the brachiocephalic trunk, which is to the right and slightly anterior to the other two branches and originates behind the manubrium of the sternum. Next, the left common carotid artery originates from the aortic arch to the left of the brachiocephalic trunk, then ascends along the left side of the trachea and through the superior mediastinum. Finally, the left subclavian artery comes off of the aortic arch to the left of the left common carotid artery.', 'role': 'assistant'}]