Which of the following is an example of a type IV delayed hypersensitivity reaction?

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Contact dermatitis is a type IV delayed hypersensitivity reaction that occurs when skin comes into contact with an allergen or irritant. This type of reaction involves T cells, rather than antibodies, and typically takes 24-48 hours to develop. Transfusion reaction and serum sickness are examples of type II hypersensitivity reactions, which involve antibodies binding to and damaging cells or tissues. Systemic lupus erythematosis is an example of a type III hypersensitivity reaction, which involves immune complex formation and deposition in tissues.

Which of the Following Is an Example of a Type