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Question
Which one of the following antibodies initiates an allergic reaction?
Options
lgA
lgE
lgG
lgM
MCQ
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Solution
lgE
Explanation:
IgE antibodies are responsible for allergic reactions (type I hypersensitivity). When IgE binds to allergens, it triggers the release of histamine and other chemicals from mast cells and basophils, causing symptoms like sneezing, watery eyes, and difficulty breathing. This process underlies immediate allergic responses.
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