Which immunoglobulin is the largest in size?

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IgA

IgD

IgE

IgM

answer is D.

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Detailed Solution

Concept: Glycoprotein molecules known as antibodies, or immunoglobulins, are created by plasma cells. More light and heavy chains are present in the largest immunoglobulin.
Immunoglobulins come in five different types: IgA, IgE, IgD, and IgM. IgG
IgM is the most abundant antibody because it has a pentamer with 10 antigen binding sites, making it more effective and producing a powerful immune response. It is the initial antibody to go to the infection site. They are primarily found in the blood and lymph, which also contain the majority of the antigens. To rid the body of infections, plasma B cells produce these antibodies.
Hence, the correct answer is option 4.

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