Arrange the steps of an allergic reaction in the proper order
1) Allergic symptoms appear.
2) The allergen binds with IgE.
3) IgE combines with mast cell receptors.
4) The mast cell releases histamine.
5) Plasma cells are sensitized.
a. 5 ? 3 ? 2 ? 4 ? 1
b. 1 ? 5 ? 2 ? 4 ? 3
c. 5 ? 2 ? 4 ? 3 ? 1
d. 1 ? 4 ? 5 ? 2 ? 3
e. 4 ? 5 ? 2 ? 3 ? 1
a
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