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: Medicine
[{'content': 'Sclerosing cholangitis as a side effect caused by the drug: \nSelect and explain. \nA. Floxuridine, B. Carbamazepine, C. Sulfonamides, D. Indinavir', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Sclerosing cholangitis develops after intrahepatic infusion of the chemotherapeutic agent floxuridine for hepatic metastases from a primary colonic carcinoma. Reference: Harrisons Principles of Internal Medicine, 18th Edition, Page 2560', 'role': 'assistant'}]