This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Surgery
[{'content': 'Most common site for carcinoma pancreas is \nSelect and explain. \nA. Head, B. Body, C. Tail, D. Neck', 'role': 'user'}, {'content': 'Answer: A \nExplanation: More than 85 percent of pancreatic cancers are ductal adenocarcinomas.They arise most commonly in the head of the gland Bailey & Love ,26th,1137.', 'role': 'assistant'}]