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: Medicine
Which one of the following is NOT the appropriate treatment of hyperthyroidism due to subacute lymphocytic thyroiditis ? 
Select and explain. 
A. Propylthiouracil, B. Radioactive iodine ablation, C. Subtotal thyroidectomy, D. Beta blockers
D: Beta blockers
Answer: D: Beta blockers 
Explanation: None