<prompt> Water hammer pulse seen in ?Aoic stenosisAoic regurgitationAoic stenosis and Aoic regurgitationMitral regurgitation  <response>: A rapidly rising water-hammer pulse, which collapses suddenly as aerial pressure falls rapidly during late systole and diastole Corrigans 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 Quinckes pulse, are characteristic of chronic severe AR. A booming pistol-shot sound can be heard over the femoral aeries Traubes sign, and a to-and-fro murmur Duroziezs 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 