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 hypehyroidism ? \nSelect and explain. \nA. Liothyronine, B. Propanolol, C. Methimazole, D. Potassium iodide', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Propanolol", 'role': 'assistant'}]