This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
Antigen presenting cells are 
Select and explain. 
A. Langerhans cells, B. Macrophages, C. Cytotoxic T cells, D. Helper T cells
A: Langerhans cells
Answer: A: Langerhans cells 
Explanation: Ref Robbins 7/e p197 ;9/e p210 , macrophages and B lymphocytes is also the answer Professional antigen presenting cells(APCs) are immune cells that specialize in presentingan antigen to a T-cell. The main types of professional APCs are dendritic cells (DC), macrophages, and Bcells, Langerhans cells