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': 'Features of rheumatic carditis are all except - \nSelect and explain. \nA. Aschoff nodule, B. Lymphatic infiltration, C. Myocardial fibrosis, D. Intramyocardial microemboli', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]