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': 'Lepra cell is a – \nSelect and explain. \nA. Plasma cell, B. Neutrophil, C. Lymphocyte, D. Histiocyte', 'role': 'user'}, {'content': "Answer: D \nExplanation: Virchow's lepra cells or foamy cells are undifferentiated histiocytes.", 'role': 'assistant'}]