This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Blood, Subject name: Pediatrics
[{'content': "Liver and spleen produce RBC's for \nSelect and explain. \nA. Prenatal life, B. First year of life, C. Upto five years of life, D. Lifelong", 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. a (Prenatal life). (Ref. Nelson, Paediatrics, 17th/pg.l599; Dutta, Obst., 4th/pg.42)DEVELOPMENTAL HEMATOPOIESIS OCCURS IN ANATOMICAL STAGESMesoblasticHepaticMyeloidYolk sacLiverBone marrow10-14th day to 10-12 weeks6-8 weeks to throughout the gestation5th month to throughout life long', 'role': 'assistant'}]