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': 'All are true of actue rheumatic fever except - \nSelect and explain. \nA. Aschoff nodule in mycoacardium, B. Focal myocardial fiber necrosis, C. Microthrombi in arteriole, D. Lymphocytic myocarditis', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]