This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.V.S, Subject name: Pathology
[{'content': 'A15 year old boy presented with pancarditis, on myocardial biopsy, following finding was seen. Diagnosis? \nSelect and explain. \nA. Aschoff nodule, B. TB, C. FB giant cells, D. None', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. (a) Aschoff noduleHere one can see collection of foci of swollen eosinophilic collagen surrounded by: Lymphocytes (primary T cells), Occasional plasma cells, Aschoff giant cells Q (macrophages of rheumatic fever) Q and Antischkow cells (cells with caterpillar like chromatin marked with an arrow)', 'role': 'assistant'}]