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: Physiology
Structure passing through the opening marked 3 in the diaphragm is 
Select and explain. 
A. Oesophagus, B. Left gastric nerve, C. Right phrenic nerve, D. Hemiazygos vein
C: Right phrenic nerve
Answer: C: Right phrenic nerve 
Explanation: Caval opening T8- The caval opening passes through the central tendon of the diaphragm. It contains the inferior vena cava and the right phrenic nerve. Ref anatomy B. D. Chourasia thorax p54