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': 'Thioamide drugs: \nSelect and explain. \nA. Aggregate endocrine exophthalmos., B. Are safe in children., C. Produce irreversible hypothyroidism., D. Do not produce relapse.', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Thioamide drugs block the synthesis of thyroid hormones and are safe in children. If hypothyroidism develops, stopping the drug can reverse it. Despite adequate treatment, relapse is seen in 40-60% of the cases. Worsening of ophthalmopathy has been reported with radioactive iodine but not with thioamides.', 'role': 'assistant'}]