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': 'Decreased RBC production is seen in - \nSelect and explain. \nA. Intramuscular folate administration, B. Renal failure, C. Post gastrectomy, D. Prosthetic valve hemolysis', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]