Which immunoglobulin is associated with this type of hypersensitivity?

IgE is the immunoglobulin responsible for Type I (immediate) hypersensitivity. IgE binds to FcεRI receptors on mast cells and basophils. Cross-linking by antigen triggers degranulation and histamine release. IgG is involved in Type II and IV. IgM activates complement in Type II. IgA is the secretory mucosal immunoglobulin.