VMC-0077
QUESTION
The major immunoglobulin produced during secondary immune response?
OPTIONS
(A) IgM
(B) IgD
(C) IgA
(D) IgG
ANSWER
(D) IgG
EXPLANATION
The secondary immune response is dominated by IgG because memory B cells rapidly produce class-switched, high-affinity antibodies after re-exposure to the antigen. Hence option D is correct; IgM is more characteristic of the primary response, while IgD and IgA are not the principal systemic antibody class in this setting.
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