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
Vegetations on undersurface of A.V. valves are found in - 
Select and explain. 
A. Acute rheumatic fever, B. Limban Sach's endocarditis, C. Non thrombotic bacterial endocarditis, D. Chronic rheumatic carditis
B: Limban Sach's endocarditis
Answer: B: Limban Sach's endocarditis 
Explanation: None