This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bacteriology, Subject name: Microbiology
Streptococcus cell wall resembles 
Select and explain. 
A. Cardiac valves, B. Myocardium, C. Synol fluid, D. Intima of vessels
B: Myocardium
Answer: B: Myocardium 
Explanation: Various structural components of Streptococcus pyogenes exhibit antigenic cross-reaction with different tissues of the human body.*Capsular hyaluronic acid- Human synol fluid*Cell wall proteins- Myocardium*Group A carbohydrates- Cardiac Valves*Cytoplasmic membrane antigens- Vascular intima*Peptidoglycans- Skin antigens(Ref: Ananthanarayan 9th edition, p212)