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
The following feature is in our of ulcerative colitis over Crohn&;s disease 
Select and explain. 
A. Cobblestoning, B. Rectal sparing, C. Fistula, D. Blood and mucus in stool
D: Blood and mucus in stool
Answer: D: Blood and mucus in stool 
Explanation: 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