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': "All are true regarding fetal RBC's Except - \nSelect and explain. \nA. Elevated 2,3 DPG, B. Decreased carbonic anhydrase activity, C. Decreased life span, D. High RBC volume", 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]