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: Pathology
[{'content': 'Most common site for small intestinal carcinoma is - \nSelect and explain. \nA. Duodenum, B. Jejunum, C. lleum, D. All are affected equally', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Answer- A. DuodenumAdenocarcinoma is the most frequent carcinoma found in small intestine.Upper small intestine is the most common site for carcinoma with duodenum, jejunum and ileum.', 'role': 'assistant'}]