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
In pregnancy 
Select and explain. 
A. Radioiodine contraindicated, B. Thiouracil is contraindicated, C. Surgery is contraindicated, D. None
A: Radioiodine contraindicated
Answer: A: Radioiodine contraindicated 
Explanation: None