This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Small & Large Intestine, Subject name: Surgery
X-ray finding more suggestive of ulcerative colitis than Crohn's disease: 
Select and explain. 
A. Rectal sparing, B. Loss of haustrations, C. Tracking of contrast within the bowel wall, D. Discontinuous lesions
B: Loss of haustrations
Answer: B: Loss of haustrations 
Explanation: Ans. (b) Loss of haustrationsRef: Sabiston 20th edition, Page 1342* Lead pipe appearance: Loss of haustrations* Rectal sparing is a feature of Crohn's* Skip lesions are also seen in Crohn's.