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
Foramen of Morgagni refers to an opening in: 
Select and explain. 
A. The brain, B. The lesser omentum, C. The skull, D. The diaphragm
D: The diaphragm
Answer: D: The diaphragm 
Explanation: The diaphragm