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: Pediatrics
[{'content': 'A feature of fetal RBC in adult – \nSelect and explain. \nA. Alkali denaturation resistant, B. Small in size, C. Has more 2,3 DPG level, D. More iron than adult RBC', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Features of fetal RBCs\n\nIt contains less 2,3 DPG\nIt is alkali denaturation resistant\nIt is larger in size than adult RBC → Larger in volume\nIt contains less iron than adult RBC\nLife span is less.', 'role': 'assistant'}]