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 among the major criteria to diagnose Marfan syndrome, except \nSelect and explain. \nA. Ectopia lentis, B. Dilatation of the ascending aoa, C. Dural ectasia, D. Striae over the buttocks', 'role': 'user'}, {'content': 'Answer: D \nExplanation: The diagnosis of MFS according to the Ghent standards, the major criteria includes presence of at least four skeletal abnormalities, ectopia lentis, dilation of the ascending aoa with or without dissection, dural ectasia, and a blood relative who meets the same criteria, with or without a DNA diagnosis. Striae is not among the major criteria. Reference: Harrisons Principles of Internal Medicine, 18th Edition, Page 3213', 'role': 'assistant'}]