Vegetations on undersurface of A.V. valves are found in: (A) Acute rheumatic fever, (B) Libman Sach's endocarditis, (C) Non thrombotic bacterial endocarditis, (D) Chronic rheumatic carditis
Answer is B. Ref: R Alagappan - Manual of Practical Medicine 4th Edition.pg no:163 Endocarditis associated with SLE (Libman-Sachs endocarditis): The vegetations are 3-4 mm in size, composed of degenerating valve tissue; functional disability is minimal; ventricular surface of the mitral valve is commonly involved; aoic valve involvement is rare; entire valve apparatus can be involved.