Question

Which of the following is used in the treatment of thyroid cancer?

• A. $I_{131}$
• B. $U_{238}$
• C. $R{a}_{224}$
• D. $C_{14}$

Answer 1

The correct option is A $I_{131}$

The thyroid gland absorbs nearly all of the iodine in the body. When radioactive iodine (RAI) or I-131 is taken into the body in liquid or capsule form, it concentrates in the thyroid cells. The radiation can destroy the thyroid gland and any other thyroid cells, including cancer cells that take up iodine with little effect on the rest of the body.
Therefore, the correct answer is option A.