This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General pathology, Subject name: Pathology
The professional antigen presenting cells are 
Select and explain. 
A. Endothelial cells, B. Dendritic cells, C. T cells, D. B cells
B: Dendritic cells
Answer: B: Dendritic cells 
Explanation: Professional APC Express MHC class II molecules Dendritic cells Immature dendritic cells (Langerhans cells) Macrophages B cells Non - professional APC Do not express MHC class II molecules Stimulated by cytokines like IFN Fibroblasts Thymic epithelial cells Thyroid epithelial cells Glial cells Pancreatic beta cells Endothelial cells