Mprotein is produced by
pseudomonas aeruginosa
staphylococcus aureus
propionibacterium acnes
streptococcus pyogenes

The correct answer will be option- Streptococcus pyogenes.

Explanation:

M protein is an important virulence factor which is produced and expressed on the surface of Streptococcus pyogenes.

This protein plays important role in the bacterial infection like adherence to epidermal keratinocytes, resistance to phagocytosis,  invasion of epithelial cells and microcolony formation.

The M-protein is a α-helical coiled structure protein which consists of the four distinct regions (A–D) in which  A-region in the N-terminal is highly variable.

Thus,  option- Streptococcus pyogenes is the correct answer.

the relative standard reduction potential of the half-cell in which reduction occurs; more positive than the other half-cell. reduction is a chemical process in which electrons are added to an atom or an ion; it always occurs accompanied by oxidation of the reducing agent.