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: Pathology
Which of the following is the function of MHC I and II? 
Select and explain. 
A. Signal transduction in T cells, B. Antibody class switching, C. Antigen presentation to T cells, D. Increase the secretion of cytokines
C: Antigen presentation to T cells
Answer: C: Antigen presentation to T cells 
Explanation: The function of MHC molecules is to display peptide fragments of protein antigens for recognition by antigen specific T cells.