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: Microbiology
[{'content': 'Streptococcal cell wall polysacharide cross reacts with? \nSelect and explain. \nA. Myocardial muscle, B. Cardiac value, C. Endocardium, D. Synol fluid', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Myocardial muscle Group A carbohydrate (cell wall polysaccharide of gorup A streptococcus, i.e. streptococcus pyogenes) cross reacts with myocardium.", 'role': 'assistant'}]