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: Pathology
[{'content': 'Most common site for Ca Pancreas? \nSelect and explain. \nA. Head, B. Body, C. Tail, D. Uncinate process', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. (a) Head(Ref: Robbins 9th/pg 892-894; 8th/pg 900-903)Pancreatic Carcinoma isSite ofPancreatic Head (most common) Q > Diffuse > Body > Tail', 'role': 'assistant'}]