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: Surgery
[{'content': 'A repo of "lead-pipe" appearance of the colon barium enema would be diagnostic of \nSelect and explain. \nA. Amebiasis, B. Ulcerative colitis, C. Tuberculosis of the syndrome, D. A granulomatous polysosis', 'role': 'user'}, {'content': 'Answer: B \nExplanation: .Ulcerative colitis on barium enema shows Loss of haustrations,resulting in lead pipe appearance. ref:SRB&;s manual of surgery ,ed 3,pg no 849', 'role': 'assistant'}]