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: Medicine
Streptolysin 'O' acts through- 
Select and explain. 
A. N- muraminidase, B. Teichoic acid, C. Muramic acid, D. Cytochrome oxidase
B: Teichoic acid
Answer: B: Teichoic acid 
Explanation: None