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': "Aschoff's bodies are seen in - \nSelect and explain. \nA. Rheumatic myocarditis, B. Rheumatic arthritis, C. Bacterial endocarditis, D. Marantic endocarditis", 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]