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: Anatomy
[{'content': 'Blood is produced in first six months in fetus in? \nSelect and explain. \nA. Liver, B. Spleen, C. Bone marrow, D. None', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., LiverErythropoiesis sitesIntrauterine0-10 weeks - Yolk sac10 weeks - 5 months - Liver (major organ) and spleen5 month onward - Bone marrowAfter bihUpto 20 years - Bone marrow of all bones After 20 years - Flat bones of axial skeletal and proximal end of humerus and femur.", 'role': 'assistant'}]