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: Pediatrics
[{'content': 'Which of the following features of rheumatic fever is not due to molecular mimicry? \nSelect and explain. \nA. Myocarditis, B. Polyarthritis, C. Valvulitis, D. Pericarditis', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans: (d) PericarditisMolecular mimicry is definitely the current accepted hypothesis regarding pathogenesis of acute rheumatic fever.It is strongly related to presence of cross-reacting antigens in heart, brain, skin and joints.In heart, anti-streptococcal antibodies reacting with 'Cardiac myosin' and subsequent T cell activation is proposed. This response is mainly seen in myocardium and Endocardium (Valves).", 'role': 'assistant'}]