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': 'Peripheral conversion of T4 to T3 is inhibited by? \nSelect and explain. \nA. Propranolol, B. Diltiazem, C. Sotalol, D. Sodium iodide', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Propranolol", 'role': 'assistant'}]