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: Medicine
[{'content': 'Which of the following is the most prominent feature of immunoproliferative small intestinal disease (IPSID) - \nSelect and explain. \nA. Malabsorption, B. Obstruction, C. Bleeding, D. Abdominal pain', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]