Which one of the following are most improtant antigen presenting cells in human-: (A) Macrophages, (B) Plasma cells, (C) Langerhan's cells\/histiocytes, (D) Lymphocytes
Answer is C. 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.