⟩ In allergic reaction
* a) Arthus reaction is a type IV reaction
* b) Anaphylaxis occurs in patients who have had no previous exposure to the offending substance
* c) Contact dermatitis is a type IV reaction
* d) Positive Mantoux test is a type III reaction
* e) Urticaria is a type II reaction
Answer a. F b. F c. T d. F e. T