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: Pharmacology
[{'content': 'Darbopoetin is most useful in treatment of anemia caused by ? \nSelect and explain. \nA. Chronic renal failure, B. Iron deficiency, C. Chemotherapy induced, D. Aplastic anemia', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Chronic renal failure Darbepoetin is hyperglycosylated modified erythropoietin for the treatment of anemia of chronic renal failure which is due to low levels of erythropoietin (kidney is the major source of erythropoietin).", 'role': 'assistant'}]