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
Which of the following structures pass through the "Aoic Hiatus" of the diaphragm? 
Select and explain. 
A. Inferior vena cava, B. Oesophagus, C. Vagus nerve, D. Azygos vein
D: Azygos vein
Answer: D: Azygos vein 
Explanation: Azygos vein