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
Liothyronine is the drug of choice in treatment of: 
Select and explain. 
A. Myxedema coma., B. Cretinism, C. Iodine deficiency Goiter., D. Non resectable causes of papillary thyroid carcinoma.
A: Myxedema coma.
Answer: A: Myxedema coma. 
Explanation: Myxoedema coma is an emergency condition; hence faster acting T3 (Liothyronine) is preferred over thyroxine (T4). For the other indications thyroxine is preferred because of longer duration of action.