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 
Select and explain. 
A. Coarctation of aoa, B. Rickets, C. ASD, D. Multiple myeloma
A: Coarctation of aoa
Answer: A: Coarctation of aoa 
Explanation: A i.e. Coarctation of aoa Inferior rib notching in coarctation of aoa is d/t pressure erosion of intercostal aeriesQ It usually takes several years to develop, so is unusual before 10 years of age.