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': 'Pulsation of uvula with every heart beat in severe aortic regurgitation is called: \nSelect and explain. \nA. Becker’s sign, B. Landolfi’s sign, C. Muller’s sign, D. Rosenbach sign', 'role': 'user'}, {'content': "Answer: C \nExplanation: Lighthouse sign (blanching & flushing of forehead)\xa0\nde Musset's sign (head nodding in time with the heart beat)\xa0\nLandolfi's sign (alternating constriction & dilatation of pupil)\xa0\nBecker's sign (pulsations of retinal vessels)\xa0\nMüller's sign (pulsations of uvula)\xa0\nQuincke's sign (pulsation of the capillary bed in the nail)\xa0\nMayne's sign (diastolic drop of BP>15 mm Hg with arm raised)\xa0\nWatson's water hammer pulse= large-volume, 'collapsing' pulse or Corrigan's pulse\xa0\nRosenbach's sign (pulsatile liver)\xa0\nGerhardt's sign (enlarged spleen)\xa0\nTraube's sign (a 'pistol shot' systolic sound heard over the femoral artery)\xa0\nDuroziez's sign (systolic and diastolic murmurs heard over the femoral artery when it is gradually compressed with the stethoscope)\xa0\nHill's sign - a ≥ 60 mmHg difference in popliteal and brachial systolic pressures\xa0\nLincoln sign (pulsatile popliteal artery)\xa0\nSherman sign (dorsalis pedis pulse is unexpectedly prominent in age>75 yr)", 'role': 'assistant'}]