Multiple choice Which of the following can block the Type I hypersensitivity? Histamine An IgA myeloma A myeloma protein of mixed antibody class Sodium cromoglycate Interleukin-5 Reveal answer Fill a bubble to check yourself D Correct answer Explanation Sodium cromoglycate is a mast cell stabiliser, which makes the cell resistant to triggering. It is thus able to block type I hypersensitivity.