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': 'Lifespan of RBCs in premature neonate \nSelect and explain. \nA. 120 days, B. 60 days, C. 90 days, D. 40 days', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Adults - 120 days.\nTerm infant - 60 - 90 days.\nPremature neonate - 35 - 50 days.', 'role': 'assistant'}]