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: Pathology
[{'content': "Vegetations below the AV valves are present in ? \nSelect and explain. \nA. Libman sach's endocarditis, B. Chronic rheumatic carditis, C. Acute rheumatic carditis, D. Non thrombotic endocarditis", 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Libman sack endocarditis", 'role': 'assistant'}]