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': 'Anemia in chronic renal failure (CRF) is due to -a) Decreased erythropoietin productionb) Iron deficiencyc) Hypoplastic bone marrowd) Decreased Vit-B12,e) Decreased folate levels \nSelect and explain. \nA. abc, B. bcd, C. cde, D. abe', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]