<prompt> X-ray finding more suggestive of ulcerative colitis than Crohns disease:Rectal sparingLoss of haustrationsTracking of contrast within the bowel wallDiscontinuous lesions  <response>: Ans. b Loss of haustrationsRef: Sabiston 20th edition, Page 1342 Lead pipe appearance: Loss of haustrations Rectal sparing is a feature of Crohns Skip lesions are also seen in Crohns. 