Answer:
IgE class.
Explanation:
Hypersensitivity is also known as hypersensitive reaction. Type I hyper sensitive reaction is mainly occur due to the allergy response.
The disorders of Type I hypersensitivity is asthma, anaphylaxis and atrophy. The involvement of IgE class antibody is involved in Type I hypersensitive reaction.
Thus, the answer is IgE.
