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: Pharmacology
[{'content': "Which of the following drugs inhibit 5'– deiodinase? \nSelect and explain. \nA. Propylthiouracil, B. Methimazole, C. Lugol's iodine, D. Radioactive iodine", 'role': 'user'}, {'content': "Answer: A \nExplanation: For the peripheral conversion of T1\xa0to T3, the enzyme needed is 5'-deiodinase. It is inhibited by\n\nPropylthiouracil\nPropanolol\nAmiodarone.", 'role': 'assistant'}]