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
Which of the following is the most preferred investigation for small bowel tumors: 
Select and explain. 
A. Barium meal follow-through, B. CT, C. Enteroclysis, D. MRI
C: Enteroclysis
Answer: C: Enteroclysis 
Explanation: 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.