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
Working Formulation in staging of NHL is based on - 
Select and explain. 
A. Survival characteristics of cells, B. Morphology of cells, C. Cells of origin, D. None of the above
B: Morphology of cells
Answer: B: Morphology of cells 
Explanation: None