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: Dental
The function of Langerhan's cells is 
Select and explain. 
A. Melanin synthesis, B. Protein synthesis, C. Antigen presentation to neutrophils, D. Antigen presentation to lymphocytes
D: Antigen presentation to lymphocytes
Answer: D: Antigen presentation to lymphocytes 
Explanation: None