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
Most Potent Stimulator of Naive T-cell is: 
Select and explain. 
A. Mature dendritic cells, B. Follicular dendritic cells, C. Macrophages, D. B-cell
A: Mature dendritic cells
Answer: A: Mature dendritic cells 
Explanation: Mature dendritic cells