This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Dental
[{'content': 'Vimentin type intermediate filament seen in : \nSelect and explain. \nA. Langerhans cell., B. Melanocyte cell., C. Markel cell., D. All of the Above.', 'role': 'user'}, {'content': 'Answer: A \nExplanation: It has vimentin-type intermediate filaments. Langerhans\xa0cells are involved in the immune response. In the\xa0 presence\xa0of antigenic challenge by bacterial plaque Langerhans cells migrate into the gingiva. They also migrate into the epithelium in response to chemotactic factors released by the keratinocytes to the surface receptors of Langerhans cells.', 'role': 'assistant'}]