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: Radiology
Inferior rib notching is seen in all except 
Select and explain. 
A. Aortic thrombosis, B. Taussing Blalock operation, C. Pulmonary atresia, D. Marfan's syndrome
D: Marfan's syndrome
Answer: D: Marfan's syndrome 
Explanation: Superior rib notching is seen in Marfan's syndrome.