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
A male patient 59 year old complains of multiple swellings in the neck , fever, and weight loss. General examination reveals painless lymph node enlargement in the neck and on blood investigation anaemia is revealed. Serum albumin is 32 gm/l. Lymph node biopsy shows  Reed Sternberg cells.
The 5-year rate of overall survival (%) for this patient , according to The Hasenclever prognostic index for advanced Hodgkin lymphoma is: 
Select and explain. 
A. 90, B. 74, C. 70, D. 59
B: 74
Answer: B: 74 
Explanation: None