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
Thyroid radioiodine ablation therapy is useful in all except 
Select and explain. 
A. Residual papillary carcinoma, B. Anaplastic carcinoma, C. Follicular carcinoma, D. Medullary carcinoma
D: Medullary carcinoma
Answer: D: Medullary carcinoma 
Explanation: None