This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Thyroid, Subject name: Surgery
[{'content': 'Therapy of choice for diffuse toxic goiter in a patient over 55 years: \nSelect and explain. \nA. Surgery, B. Antithyroid drugs, C. Radioiodine, D. Antithyroid drugs first followed by surgery', 'role': 'user'}, {'content': "Answer: C \nExplanation: Management- For sympathetic stimulation, first drug given is Propranolol- Antithyroid drugs - symptomatic improvement within 2 weeks- Patient becomes euthyroid within 6 weeks- Antithyroid drugs* Methimazole* Carbimazole* Propylthiouracil Anti-thyroid DOC* In Graves' disease - Methimazole* In Pregnancy - Carbimazole* In Thyrotoxic crisis - Propylthiouracil- TOC - Total Thyroidectomy- Alternative treatment - Radioactive Iodine Ablation- Indications of RAI Ablation* Elderly Patients* Patient with surgical co-morbidities* Recurrence after surgery", 'role': 'assistant'}]