This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Immunology, Subject name: Microbiology
[{'content': 'Most efficient antigen presenting cell in the skin - \nSelect and explain. \nA. Dendritic cell, B. Macrophages, C. Langerhans cell, D. Kupffer cells', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Langerhans cells are dendritic cells (antigen-presenting immune cells) of the skin and mucosa, and contain large organelles called Birbeck granules. They are present in all layers of the epidermis except the stratum corneum, which protects against infections, and are most prominent in the stratum spinosum. Reff: Ananthanarayanan & Panikers textbook of microbiology 9th edition pg: 138', 'role': 'assistant'}]