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': 'In pregnancy \nSelect and explain. \nA. Radioiodine contraindicated, B. Thiouracil is contraindicated, C. Surgery is contraindicated, D. None', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]