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: None', 'role': 'assistant'}]