This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Abdominal Radiography, Subject name: Radiology
[{'content': "Barium meal follow through is suggestive of: \nSelect and explain. \nA. Tuberculosis, B. Crohn's disease, C. Ulcerative colitis, D. Apple core appearance", 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. (d) Apple core appearance.', 'role': 'assistant'}]