This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, 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: Ans. D. BrainIntrauterine growth restriction (IUGR) refers to a condition in which a fetus is unable to achieve its genetically determined potential size. In asymmetrical IUGR, the fetal growth occurs during late gestation producing a brain sparing effect. Head circumference is relatively preserved compared to length and weight. Causes include placental insufficiency, pregnancy induced hypertension or maternal medical diseases.', 'role': 'assistant'}]