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: Anatomy
Not related to hilum of right lung? 
Select and explain. 
A. Azygous vein, B. Vagus nerve, C. SVC, D. Arch of aoa
D: Arch of aoa
Answer: D: Arch of aoa 
Explanation: Arch of aoa is related to left lung.