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 last tributary of the azygos vein is - 
Select and explain. 
A. Right superior intercostal vein, B. Hemi-azygos vein, C. Right bronchial vein, D. Accessory azygos vein
C: Right bronchial vein
Answer: C: Right bronchial vein 
Explanation: Tributaries of Azygos vein

Right superior intercostal vein
Right posterior intercostal veins (5 to 11)
Hemiazygos vein
Accessory hemiazygos vein
Right bronchial vein- last tributary that joins Azygos vein just before its termination.
Esophageal, mediastinal and pericardial veins.