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': 'Triiodothyronine (T3) as compared to T4 : \nSelect and explain. \nA. Is more plasma protein bound, B. Is shorter acting, C. Is less potent, D. Has delayed action', 'role': 'user'}, {'content': 'Answer: B \nExplanation: T3 is the main active thyroid hormone. It is more potent (less plasma protein bound) and faster acting than T4. How\xadever, short duration of action limits its use for the treatment of hypothyroidism (requires lifelong treatment).\nT3 is indicated for the treatment of myxedema coma.', 'role': 'assistant'}]