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
The hilum of the right lung is arched by: 
Select and explain. 
A. Recurrent laryngeal nerve, B. Azygos vein, C. Thoracic duct, D. Vagus nerve
B: Azygos vein
Answer: B: Azygos vein 
Explanation: B i.e. Azygous vein