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
[{'content': "Which one of the following are most improtant antigen presenting cells in human- \nSelect and explain. \nA. Macrophages, B. Plasma cells, C. Langerhan's cells\\/histiocytes, D. Lymphocytes", 'role': 'user'}, {'content': 'Answer: C \nExplanation: 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.', 'role': 'assistant'}]