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
Which one of the following are most improtant antigen presenting cells in human- 
Select and explain. 
A. Macrophages, B. Plasma cells, C. Langerhan's cells\/histiocytes, D. Lymphocytes
C: Langerhan's cells\/histiocytes
Answer: C: Langerhan's cells\/histiocytes 
Explanation: Robbins and Cotran pathologic basis of disease South Asia edition. *immature dendritic cells within the epidermis are called langerhans cells .dendritic cells are the most impoant antigen presenting cells for initiating T cell responses against protein antigen.