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
Notching of the ribs is seen in man 
Select and explain. 
A. TR, B. TOF, C. Coarctation of aoa, D. PDA
C: Coarctation of aoa
Answer: C: Coarctation of aoa 
Explanation: Coarctation of aoa