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: Medicine
[{'content': 'A 25-year-old man comes to the physician because of headache, dizziness, and bilateral leg claudication, Physical examination shows hypertension in the upper limbs and hypotension in the lower limbs. \n\nWhich of the following additional findings is mostly likely in this patient? \nSelect and explain. \nA. Aortic valvular stenosis, B. Notching of inferior margins of ribs, C. Patent ductus arteriosus, D. Vasculitis involving the aortic arch', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]