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: Medicine
[{'content': 'Predisposing factors for Pneumococcal Pneumonia include all of the following Except: \nSelect and explain. \nA. CRF, B. Lymphoma, C. Old Age, D. Thalassemia', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Answer is D (Thalassemia): Thalassemia has not been mentioned in the list of conditions that commonly predispose to pneumococcal infection Thalassemia is the single best answer of exclusion.', 'role': 'assistant'}]