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: Radiology
[{'content': 'Tzank cell is a - \nSelect and explain. \nA. Lymphocyte, B. Monocyte, C. Neutrophil, D. Keratinocyte', 'role': 'user'}, {'content': 'Answer: D \nExplanation: D. i.e. Keratinocyte', 'role': 'assistant'}]