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': "L–Thyroxine is used in: \nSelect and explain. \nA. Thyroid storm, B. Cretinism, C. Endemic goiter, D. Grave's disease", 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]