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': "Which of the following is non-keratinocyte? \nSelect and explain. \nA. Langhan's cell, B. RBC, C. Langerhans cell, D. Grey cell", 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]