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': 'All are resected in whipples operation except - \nSelect and explain. \nA. Duodenum, B. Head of pancreas, C. Portal vein, D. Common bile duct', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Whipples operation (Pancreaticoduodenectomy)\n\nis the most commonly performed operation for carcinoma of head of pancreas.\n\nIt includes resection of: \n\ndistal stomach \xa0 \xa0 \xa0 \xa0 \xa0 \xa0 \xa0 \xa0\xa0\ngall bladder\nduodenum\xa0\nproximal jejunum\xa0\xa0\nCBD\xa0 \xa0 \xa0 \xa0\nregional lymphatics \xa0 \xa0 \xa0 \xa0 \xa0 \xa0\xa0 \xa0 \xa0 \xa0 \xa0 \xa0 \xa0 \xa0 \xa0 \xa0 \xa0 \xa0 \xa0 \xa0 \xa0 \xa0 \xa0\xa0\nhead of pancreas\nRestoration of gastrointestinal continuity requires\npancreaticojejunostomy\ncholedochojejunostomy &\ngastrojejunostomy', 'role': 'assistant'}]