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
In treatment of hypothyroidism, thyroxine is preferred over levothyroxine: 
Select and explain. 
A. High affinity for receptors, B. Long half life, C. Faster acting, D. Can be made with recombinant DNA technology
B: Long half life
Answer: B: Long half life 
Explanation: 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.