This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pathology
[{'content': "Pseudopolyps are features of \nSelect and explain. \nA. Crohn's disease, B. Ulcerative colitis, C. Celiac sprue, D. Whipple's disease", 'role': 'user'}, {'content': 'Answer: B \nExplanation: Answer is B (Ulcerative colitis) Colonic involvement with ulcerative colitis is characterised by extensive, broad based ulceration of the mucosa in the distal colon or throughout its length. Pseudopolyps are created by bulging upwards of isolated islands of regenerating mucosa.', 'role': 'assistant'}]