Final answer:
IgA is the antibody that does not activate complement or induce inflammation, unlike IgG and IgM, which can activate the complement system and are involved in inflammatory responses.
Step-by-step explanation:
The antibody that does not activate complement or induce inflammation is IgA. IgG and IgM can both activate the complement system and thus can induce inflammation. IgA, on the other hand, primarily protects against pathogens at mucosal surfaces and does not typically activate the complement system in the same way IgG or IgM does.
IgG is significant in bacterial and viral defense and can activate complement, although not as efficiently as IgM. It is an important antibody in both primary and secondary immune responses. IgM is especially efficient at complement activation due to its pentameric structure, which allows for binding multiple antigens, significantly contributing to its ability to initiate the classical pathway of complement activation.
IgG and IgM antibodies activate complement and induce inflammation. However, IgA antibody does not activate complement or induce inflammation.