In Graves disease, antibodies bind to the TSH receptor and stimulate thyroid hormone production. This 'stimulatory' variant is classified as which type of hypersensitivity?
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Correct answer: Type II
Graves disease is a form of Type II hypersensitivity where antibodies are directed against cell surface receptors. Instead of causing cell destruction, these antibodies mimic the natural ligand (TSH) and overstimulate the target cell.
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