This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: IUGR and Feeding of Preterm Neonate, Subject name: Pediatrics
[{'content': 'In asymmetrical IUGR which organ is not affected? \nSelect and explain. \nA. Subcutaneous fat, B. Muscle, C. Liver, D. Brain', 'role': 'user'}, {'content': 'Answer: D \nExplanation: In asymmetric IUGR, brain growth (head circumference) - spared', 'role': 'assistant'}]