This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pathology
[{'content': 'Drugs used in the treatment of pruritus in PBC \nSelect and explain. \nA. Rifampicin, B. Naltrexone, C. Cholestyramine, D. All of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: .', 'role': 'assistant'}]