This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiovascular system, Subject name: Anatomy
Vegetations on under surface of cusps are found in 
Select and explain. 
A. Infective endicarditis, B. Libman sacks endocarditis, C. SABE, D. Rheumatic fever
B: Libman sacks endocarditis
Answer: B: Libman sacks endocarditis 
Explanation: Refer robbins 9/e 562 Vegetations of libman sacks endocarditis occur on surface of cusps.both surfaces are involved but most commonly affects under surface