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: Pediatrics
[{'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: International prognostic index for Non Hodgkins lymphoma icludes stage of the disease, serum LDH level, extranodal site involvement, age of the patient and performance status.', 'role': 'assistant'}]