In S Pyogenes, Which of the Following Interferes with Phagocytosis

Question

In S. pyogenes, which of the following interferes with phagocytosis?
A)M protein
B)protein A
C)collagen
D)pilin

Accepted Answer

M protein in S. pyogenes interferes with phagocytosis by preventing opsonization, which is the process by which antibodies or complement proteins coat bacteria, making them more susceptible to phagocytosis by immune cells.