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
Which of the following is the predominant immunoglobulin isotype secreted in the human MALT? 
Select and explain. 
A. IgA, B. IgD, C. IgG, D. IgE
D: IgE
Answer: D: IgE 
Explanation: Ans. (d)The vast majority of the antibody generated in the human MALT (Mucosal Associated Lymphoid Tissues) is of the IgA isotype. IgE, IgG and IgM are present, but at far lower levels, and IgD is essentially absent.