GK QUESTION#3664
Which of the following statements regarding human antibodies is/are correct?
1. IgG is the most abundant class of antibodies present in human blood.
2. IgE is mainly associated with allergic reactions and hypersensitivity.
3. IgA is predominantly found in secretions like saliva, tears, and breast milk.
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Answer
D. 1, 2 and 3 are correct
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Explanation
All three statements give standard antibody associations. IgG predominates in blood, IgE participates in allergic hypersensitivity, and secretory IgA is prominent in mucosal secretions such as saliva, tears and breast milk. These roles are not exclusive to one antibody class.