This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Pharmacology
[{'content': 'In treatment of hypothyroidism, thyroxine is preferred over levothyroxine: \nSelect and explain. \nA. High affinity for receptors, B. Long half life, C. Faster acting, D. Can be made with recombinant DNA technology', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. B. Long half lifeThyroxine is preferred over levothyroxine because it has longer half-life due to which it can be given as once daily dosing.levothyroxine is costlier and have short half-life.', 'role': 'assistant'}]