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
The antibody class specific for infectious mononucleosis is: March 2003 
Select and explain. 
A. IgA, B. IgD, C. IgM, D. IgG
C: IgM
Answer: C: IgM 
Explanation: Ans. C i.e. IgM