This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Medicine
[{'content': 'The following feature is in our of ulcerative colitis over Crohn&;s disease \nSelect and explain. \nA. Cobblestoning, B. Rectal sparing, C. Fistula, D. Blood and mucus in stool', 'role': 'user'}, {'content': 'Answer: D \nExplanation: The major symptoms of UC are diarrhea, rectal bleeding, tenesmus, passage of mucus, and crampy abdominal pain.Ulcerative ColitisCrohn\'s diseaseClinical Gross blood in stoolYes OccasionallyMucusYesOccasionallySystemic symptomsOccasionallyFrequentlyPainOccasionallyFrequentlyAbdominal massRarelyYesSignificant perineal diseaseNoFrequentlyFistulasNoYesSmall intestinal obstructionNoFrequentlyColonic obstructionRarelyFrequentlyResponse to antibioticsNoYesRecurrence after surgeryNoYesEndoscopicRectal sparingRarelyFrequentlyContinuous diseaseYesOccasionally"Cobblestoning"NoYesGranuloma on biopsyOccasionallyRadiographicSmall bowel significantly abnormalNoYesAbnormal terminal ileumNoYesSegmental colitisNoYesAsymmetric colitisNoYesStrictureOccasionallyFrequentlyRef: Harrison 19e pg: 1956', 'role': 'assistant'}]