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: Pathology
[{'content': 'Which cell is not seen in Hodgkin lymphoma ? \nSelect and explain. \nA. Reed sternberg cell, B. Lacunar cell, C. L & H cell, D. Langerhan cell', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Langerhan cell", 'role': 'assistant'}]