This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General pathology, Subject name: Pathology
Most potent stimulator of NaiveT-cells - 
Select and explain. 
A. Mature dentritic cells, B. Follicular dentritic cells, C. Macrophages, D. B-cell
A: Mature dentritic cells
Answer: A: Mature dentritic cells 
Explanation: Question repeated