This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Immunology Pa 1 (Immune Response, Antigen-Antibody Reactions, Hypersensitivity, Structure of Immune System, Immunodeficiency Disorders), Subject name: Microbiology
Heat labile immunoglobulin- 
Select and explain. 
A. IgA, B. IgG, C. IgE, D. IgM
C: IgE
Answer: C: IgE 
Explanation: Option 1, 2, 3, 4 All Abs are heat stable (Heat stability 56oC) except IgE (heat labile). IgE exhibits unique propey of heatlability (inactivated at 56degC in one hour)