<prompt> Vegetations on undersurface of A.V. valves are found in:Acute Rheumatic corditisLimban Sacks endocarditisNon thrombotic bacterial endocarditisChronic rheumatic carditis  <response>: Answer is B Libman Sacks Endocarditis Vegetation on under-surface of AV valves are typically seen in Libman Sacks Endocarditis SLE. 