Inflammatory response in allergy is due to release by mast cells of

Antibodies

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Antigens

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Histamine

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All of the above

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Solution

The correct option is A Histamine
The inflammatory response (inflammation) occurs when tissues are injured by bacteria, trauma, toxins, heat, or allergy. The damaged cells release chemicals including histamine, bradykinin, and prostaglandins. Histamine is released from mast cells. These chemicals cause blood vessels to leak fluid into the tissues, causing swelling.
So, the correct answer is 'Histamine'.

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