<prompt> Virulence factor of group A beta hemolytic streptococci:-Protein MProtein TProtein RLipotechoic acid  <response>: Option 1 2 3 Cell wall antigens: Inner thick peptidoglycan layer confers cell wall rigidity, induces inflammatory response and has thrombolytic activity C-carbohydrate antigen: Present as middle layer and is group specific Outer layer of protein M, T, R and lipoteichoic acid helps in adhesion M protein - Major virulence factor of S pyogenes Option 4 Outer layer of lipoteichoic acid helps in adhesion 