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
[{'content': 'Which of the following is the most potent antigen presenting cell \nSelect and explain. \nA. Fibroblasts, B. Dendritic cells, C. Macrophages, D. B Cells', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Dendritic cells are most potent and most effective antigen presenting cells.', 'role': 'assistant'}]