This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nuclear medicine, Subject name: Radiology
Thyrotoxicosis patients with least radio iodide uptake seen in: 
Select and explain. 
A. Toxic adenoma, B. Grave's disease, C. MNG, D. Sub - acute thyroiditis
D: Sub - acute thyroiditis
Answer: D: Sub - acute thyroiditis 
Explanation: Sub-acute thyroiditis or de Quervain thyroiditis is an uncommon condition, yet is considered the most common cause of painful thyroiditis. Disease is thought to have a viral origin, Has the least radioactive iodine uptake. RAIU in other diseases: