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
Non Hodgkin's lymphoma--------- diffuse,large----- belongs to - 
Select and explain. 
A. Low grade, B. Intermediate grade, C. High grade, D. None of the above
C: High grade
Answer: C: High grade 
Explanation: None