Question

Iodine-131 is used

• A. To detect cancer
• B. To detect lung cancer
• C. To detect thyroid cancer
• D. To detect brain cancer

Answer 1

Answer: (C)

To detect thyroid cancer

Iodine-131 is also called as radio iodine. It is an important radioisotope of iodine. Iodine-131 is also one of the most commonly used gamma-emitting radioactive industrial tracer. Iodine is an important component of thyroxine hormone. So, thyroid gland takes the I-131, which is then incorporated into the thyroxine.