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
Reed Sternberg cells in Hodgkin's lymphoma are derived from 
Select and explain. 
A. Macrophages, B. N K cell, C. T cell, D. B cell
D: B cell
Answer: D: B cell 
Explanation: None