This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pathology
What vascular anomaly is most associated with severe tracheobronchial anomalies? 
Select and explain. 
A. Right aoic arch, left subclan, B. Double aoic arch, C. Pulmonary aery sling, D. All of the above
C: Pulmonary aery sling
Answer: C: Pulmonary aery sling 
Explanation: .