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: Microbiology
All IgG are responsible are coagglutination by bind to S.Aureus protein-A except 
Select and explain. 
A. IgG1, B. IgG2, C. IgG3, D. IgG4
C: IgG3
Answer: C: IgG3 
Explanation: IgG3 not responsible for Coagglutination.