This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pituitary-Hypothalmic System and Thyroid, Subject name: Pharmacology
[{'content': 'Beta blockers are used in hypehyroidism: \nSelect and explain. \nA. As sho term symptomatic therapy till effect of carbimazole develops, B. As long term therapy after subtotal thyroidectomy, C. In patient not responding to carbimazole, D. To potentiate the effect of radioactive iodine', 'role': 'user'}, {'content': 'Answer: A \nExplanation: -Major symptoms in a patient of hypehyroidism are sympathetic in nature. -Beta blockers are used to treat these symptoms.', 'role': 'assistant'}]