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
All are antigen presenting cells except - 
Select and explain. 
A. T-cells, B. B-cells, C. Langerhan's cell, D. Dendritic cells
A: T-cells
Answer: A: T-cells 
Explanation: Ans. is 'a' i.e., T cells