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': "Quincke's sign in  aortic regurgitation refers to \nSelect and explain. \nA. Pulsation of uvula in time with heart beat, B. Prominent retinal artery  pulsation, C. Capillary nail bed pulsation, D. Pulsating liver in time with heart beat", 'role': 'user'}, {'content': "Answer: C \nExplanation: Sign\n\xa0Presentation\n\n\n\n\nBecker's sign\nProminent retinal artery pulsation\n\n\nCorrigan's sign\nProminent carotid pulsation\n\n\nDe Musset's sign\nHead nodding in time with the heart beat\n\n\nDuroziez's sign\nSystolic and diastolic murmurs heard over the femoral artery while partially compressing the vessel with the diaphragm of the stethoscope\n\n\nGerhardt's sign\nPulsation of the spleen in time with the heart beat\n\n\nHill's sign\nHigher blood pressure (>20mmHg) in the legs than in the arms.\n\n\nLandolfi's sign\nRhythmic pupillary pulsation in time with the heart beat.\n\n\nLincoln sign\nExcessive pulsation in the popliteal artery.\n\n\nMayne's sign\nA fall in diastolic blood pressure (> 15mm Hg ) on raising the arm above the head\n\n\nMuller's sign\nPulsation of the uvula in time with the heart beat\n\n\nQuincke's sign\nProminent capillary nail bed pulsation\n\n\nRosenbach's sign\nPulsation of the liver in time with the heart beat\n\n\nTraube's sign\nA double sound heard over the femoral artery while compressing it distally\n\n\nAshrafian sign\xa0\nPulsatile pseudo proptosis.\n\n\nSherman's sign\nAn easily palpable dorsalis pedis pulse in a patient over the age of 75 years.", 'role': 'assistant'}]