This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Microbiology
Which Immunoglobulin is involved in anaphylaxis: March 2007 & September 2011 March 2013 
Select and explain. 
A. IgA, B. IgE, C. IgG, D. IgM
B: IgE
Answer: B: IgE 
Explanation: Ans. B: IgE