<prompt> Thyroid ablation is done using which radioisotope of Iodine: March 2012I-123I-125I-131I-135  <response>: Ans: C i.e. I-131 Iodine radioisotopes and uses I-123 is the agent of choice for radioactive iodine uptake RAIU I-131 is used as NaI in diagnosis and treatment of thyroid diseases 