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 tumour of the pancreas is \nSelect and explain. \nA. Adeno-carcinoma, B. Squamous cell carcinoma, C. Adeno-squamous cell carcinoma, D. Duct cell adeno carcinoma', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Exocrine tumors are mostly Solid tumors (75%) among which main is Ductal adenocarcinoma(85%).', 'role': 'assistant'}]