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: Pathology
[{'content': 'Sterile vegetations are seen in all except \nSelect and explain. \nA. SLE, B. Infective endocarditis, C. Rheumatic fever, D. Marantic endocarditis', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Infective endocarditis is a serious infection mandating prompt diagnosis and intervention. Microbial invasion of hea valves or mural endocardium--often with destruction of the underlying cardiac tissues--characteristically results in bulky, friable vegetations composed of necrotic debris, thrombus, and organisms.destruction of the underlying cardiac tissues--characteristically results in bulky, friable vegetations composed of necrotic debris, thrombus, and organisms. (Robbins Basic Pathology,9th edition,pg no.393)', 'role': 'assistant'}]