The nursing instructor is explaining the four types of allergic reaction to the nursing students. the instructor explains that allergic rhinitis is a:

Type I hypersensitivity reaction

Explanation:

Type I reactions (ie, immediate hypersensitivity reactions) involve immunoglobulin E (IgE)–mediated release of histamine and other mediators from mast cells and basophils. Examples include anaphylaxis and allergic rhinoconjunctivitis. An example is contact dermatitis from poison ivy or nickel allergy.

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