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 is used to control tachycardia and palpitations in persons with acute symptoms of hyperthyroidism ? \nSelect and explain. \nA. Liothyronine, B. Propranolol, C. Methimazole, D. Potassium iodide solution', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]