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': 'A 35 year pregnant woman comes graves disease in first trimester. What is preferred treatment? \nSelect and explain. \nA. Drugs alone, B. Surgery followed by drugs, C. Radio- iodine ablation, D. Observation', 'role': 'user'}, {'content': 'Answer: A \nExplanation: PTU is given in pregnant woman. Carbimazole is contraindicated.', 'role': 'assistant'}]