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
[{'content': 'Most friable vegetations is seen in: \nSelect and explain. \nA. Infective endocarditis, B. Libman sacks endocarditis, C. Rheumatic hea disease, D. Rheumatoid hea disease', 'role': 'user'}, {'content': 'Answer: A \nExplanation: The hallmark of infective endocarditis is the presence of friable,bulky and potentially destructive vegetations containing fibrin,inflammatory cells and bacteria or other organisms on the hea valves. (ref Robbins 9/e560)', 'role': 'assistant'}]