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 most potent antigen presenting cell 
Select and explain. 
A. Fibroblasts, B. Dendritic cells, C. Macrophages, D. B Cells
B: Dendritic cells
Answer: B: Dendritic cells 
Explanation: Dendritic cells are most potent and most effective antigen presenting cells.