This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.V.S, Subject name: Medicine
[{'content': 'Water hammer pulse seen in ? \nSelect and explain. \nA. Aoic stenosis, B. Aoic regurgitation, C. Aoic stenosis and Aoic regurgitation, D. Mitral regurgitation', 'role': 'user'}, {'content': 'Answer: B \nExplanation: A rapidly rising "water-hammer" pulse, which collapses suddenly as aerial pressure falls rapidly during late systole and diastole (Corrigan\'s pulse), and capillary pulsations, an alternate flushing and paling of the skin at the root of the nail while pressure is applied to the tip of the nail (Quincke\'s pulse), are characteristic of chronic severe AR. A booming "pistol-shot" sound can be heard over the femoral aeries (Traube\'s sign), and a to-and-fro murmur (Duroziez\'s sign) is audible if the femoral aery is lightly compressed with a stethoscope. ref : Harrison&;s principle of internal medicine,20th edition,pg no.1944', 'role': 'assistant'}]