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
[{'content': 'Most common form of diaphragmatic hernia is: \nSelect and explain. \nA. Bochdalek hernia, B. Morgagni hernia, C. Paraesophageal hernia, D. None of the above', 'role': 'user'}, {'content': "Answer: A \nExplanation: 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.", 'role': 'assistant'}]