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: Radiology
Most suitable radioisotope of Iodine for treating hypehyroidism is: 
Select and explain. 
A. V", B. 1125, C. I131, D. 1132
C: I131
Answer: C: I131 
Explanation: I131