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: Medicine
[{'content': 'Jod-Basedow phenomenon refers to which of the following? \nSelect and explain. \nA. Iodine excess causing suppression of TSH, B. Iodine excess causing hypehyroidism, C. Iodine excess causing transient decrease in thyroid hormone production, D. Iodine excess causing regression of MNG', 'role': 'user'}, {'content': 'Answer: B \nExplanation: It is named for Karl Adolph von Basedow, a German physician and the German word for iodine, "jod". It is the opposite of the Wolff-Chaikoff effect. Amiodarone can cause thyrotoxicosis that may be caused by either a Jod-Basedow effect from the iodine load, in the setting of MNG or incipient Graves\' disease. Ref: Harrisons Principles of Internal Medicine, 18th Edition, Table 341-6, Causes of Thyrotoxicosis, Pages 2922, 2930-31.', 'role': 'assistant'}]