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 presentating cells are which of the following 
Select and explain. 
A. Astrocytes, B. Endothelial cells, C. Epithelial cells, D. Langerhans cells
B: Endothelial cells
Answer: B: Endothelial cells 
Explanation: Ref Robbins 9/e p195 epithelial and Langerhans cells 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 Other APC are endothelial cells, Langerhans cells, epithelial cells