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Question

Which antibody (Ig) is produced in primary immune response?

A
IgA
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B
IgE
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C
IgG
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D
IgM
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Solution

The correct option is C IgM
IgM - It is the first immunoglobulin to be secreted in response to an antigen. It is temporary and disappears within days or weeks.
IgG - It appears after IgM and usually persists for the long duration of time, in some instances, life long.
IgE - It is associated with an allergic response like asthma.
IgA - It is present in the mucosal linings of internal organs like the intestines.
Therefore, the correct answer is option D.

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