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': 'Which is not pre-malignant at some site - \nSelect and explain. \nA. Bronchiectasis, B. Cholilithiasis, C. Ulcerative colitis, D. Leukoplakia', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Bronchiectasis is not a premalignant condition.\n\nCholelithiasis predisposes to carcinoma Gallbladder\nUlcerative colitis predisposes to : \xa0 \xa0 \xa0 \xa0 \xa0\n\n(a)\xa0colorectal cancer-Sabiston 16th/ep. 953\n(b)\xa0cholangiocarcinoma.\n\nLeukoplakia: Predisposes to squamous cell carcinoma at the respective site.', 'role': 'assistant'}]