Which antibody is found on the surface of a B cell and activates it to become a plasma cell?
A) IgA
B) IgD
C) red blood cell antigen
D) IgG
B
Explanation: A) Immunoglobulin A is not associated with B cells.
B) Correct!
C) Red blood cell antigens are only on red blood cells.
D) Immunoglobulin G is not associated with B cells.
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