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
Following can cause rib notching except: 
Select and explain. 
A. Blalock Taussig shunt, B. Waterston Cooley's shunt, C. Pulmonary atresia with large VSD, D. All
B: Waterston Cooley's shunt
Answer: B: Waterston Cooley's shunt 
Explanation: B i.e. Waterston Cooley's shunt