Which of the following is an example of a hypersensitivity reaction characterized by the body mistakenly identifying its normal constituent as foreign?
A) Hay fever
B) Goodpasture's syndrome
C) Lupus erythematosus
D) Rheumatoid arthritis
Ans: B
Feedback: Type II reactions, or cytotoxic hypersensitivity, occur when the system mistakenly identifies a normal constituent of the body as foreign. An example of this type of reaction is Goodpasture's syndrome.
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