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
Which cell is not seen in Hodgkin lymphoma ? 
Select and explain. 
A. Reed sternberg cell, B. Lacunar cell, C. L & H cell, D. Langerhan cell
D: Langerhan cell
Answer: D: Langerhan cell 
Explanation: Ans. is 'd' i.e., Langerhan cell