This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: JIPMER 2018, Subject name: Pathology
Origin of lymphoplasmacytic lymphoma is from:- 
Select and explain. 
A. Germinal centre T cell, B. Germinal centre B cell, C. Post germinal centre B cell, D. Pre germinal centre B cell
C: Post germinal centre B cell
Answer: C: Post germinal centre B cell 
Explanation: Lymphoplasmacytic lymphoma (Waldenstrom Macroglobinemia) : B cell lymphoma that exhibit plasmocytic differentiation, clinical symptoms dominated by hyperviscosity related to high level of tumor derived IgM. Origin:- Post geminal Centre B cell.