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': "Hernia into pouch of Douglas is __________ hernia : \nSelect and explain. \nA. Beclard's, B. Bochdaleks, C. Blandin's, D. Berger's", 'role': 'user'}, {'content': "Answer: D \nExplanation: Beclard's hernia → is the femoral hernia through the opening of the saphenous vein (named after Pierre Augustin Beclard).", 'role': 'assistant'}]