Question

Which of the following class of immunoglobulins can trigger the complement cascade?

• A. $IgA$
• B. $IgM$
• C. $IgD$
• D. $IgE$

Answer 1

Answer: (B)

$IgM$

The complement cascade is a part of the immune system. It consists of more that 20 different protein molecules. In the case of infection, this system is activated, resulting in a sequence of events on the pathogenic surface thereby destroying it. IgM and IgG are the antibodies involved in this process of which IgM is more active

So, the correct answer is '$IgM$'