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': 'Propylthiouracil is preferred over Methimazole in treatment of Thyroid storm because \nSelect and explain. \nA. It is more potent antithyroid drug., B. It is less plasma protein bound, C. It decreases peripheral conversion of T4 to T3, D. All of the above', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Propylthiouracil is preferred over Methimazole in treatment of Thyroid storm because: Propylthiouracil impairs peripheral conversion of T4 - T3 However, PTU is less potent and has higher plasma protein binding as compared to methimazole.', 'role': 'assistant'}]