This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Immunology, Subject name: Microbiology
Immunoglobulin that is inactive at high temperature is? 
Select and explain. 
A. IgG, B. IgA, C. IgM, D. IgE
D: IgE
Answer: D: IgE 
Explanation: IgE is heat liable ie, inactivated when heated from 5 min up to1 hr at 56 degrees. Reff: Ananthanarayan & Panikers textbook of microbiology 9th edition pg:99