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
[{'content': 'International prognostic index for lymphomas includes the following prognostic factors, except - \nSelect and explain. \nA. Stage of disease, B. Number of extralymphatic sites involved, C. LDH, D. Hemoglobin and albumin', 'role': 'user'}, {'content': 'Answer: D \nExplanation: The prognosis of patients with NHL is best assigned using the International Prognostic Index (IPI) .\nThis is a powerful predictor of outcome in all subtypes of NHL.\nPatients are assigned on IPI score based on the presence or absence of five adverse prognostic factors:-\n\n\nAge > 60 years\nElevated serum LDH\nPerformance status 2 (ECOG) or ≤ 70 ( Karnofsky)\n> 1 site of extranodal (extra lymphatic ) involvement\nAnn Arbor Stage III or IV', 'role': 'assistant'}]