This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pancreas, Subject name: Surgery
[{'content': 'Pancreaticoduodenectomy is the treatment of choice for: \nSelect and explain. \nA. Duodenal carcinoma, B. Pancreatic carcinoma, C. Gallbladder carcinoma, D. Gastric carcinoma', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. (b) Pancreatic carcinomaWhipple's procedure (Pancreaticoduodenectomy) is done for* Pancreatic head cancer* Periampullary cancer* Duodenal cancer* Distal CBD Cancer* Best prognosis after Whipple's surgery among the above sites- DUODENAL CANCER", 'role': 'assistant'}]