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 does not present antigens: 
Select and explain. 
A. NK cells, B. Dendritic cells, C. Langerhans cells, D. Macrophages
A: NK cells
Answer: A: NK cells 
Explanation: APC (Antigen-presenting cell): 

Most common APC → Immature dendritic cell.
The most potent stimulator of native T cell → Mature dendritic cell.
APCs are – Dendritic cells, Langerhan’s cells, B-cell.