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
In Non-Hodgkin's lymphoma early involvement of bone marrow is typical of which variety - 
Select and explain. 
A. Diffuse, B. Nodular, C. Lymphocytic well differentiated, D. Lymphocytic poorly differentiated
B: Nodular
Answer: B: Nodular 
Explanation: None