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
[{'content': 'Bacterial vegetations in heart valves are seen in: \nSelect and explain. \nA. Rheumatic heart disease, B. Infective endocarditis, C. A-V shunt, D. Corpulmonale', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]