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: Surgery
[{'content': "Grave's disease is characterized by: \nSelect and explain. \nA. Goiter., B. Thyrotoxicosis., C. Exophthalmos., D. All of the above.", 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]