This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Small intestine, Subject name: Surgery
[{'content': 'Which of the following is the most preferred investigation for small bowel tumors: \nSelect and explain. \nA. Barium meal follow-through, B. CT, C. Enteroclysis, D. MRI', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Enteroclysis: Contrast study of small bowel by infusing contrast agent through Nolan intestinal tube Contrast agent- High density microbar solution with methyl cellulose or water soluble iodine dye Indications: Small bowel tumors Stricture small bowel Congenital anomalies Crohns disease, intestinal tuberculosis Advantages: Easy to perform & well tolerated. More sensitive than conventional barium studies and less invasive than enteroscopy. Tumor characterization and staging can be performed using a single examination.', 'role': 'assistant'}]