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: Surgery
Most common form of diaphragmatic hernia is: 
Select and explain. 
A. Bochdalek hernia, B. Morgagni hernia, C. Paraesophageal hernia, D. None of the above
A: Bochdalek hernia
Answer: A: Bochdalek hernia 
Explanation: The most common variant of a congenital diaphragmatic hernia (CDH) is a posterolateral defect, also known as a Bochdalek's hernia. Ref: Schwaz's principle of surgery 9th edition, chapter 39.