Multiple choice Which of the following radioactive nuclides is used as RNT agent? Iodine-131 Phosphorus-32 Yttrium-90 Boron-10 Reveal answer Fill a bubble to check yourself C Correct answer Explanation Yttrium-90 is used for treatment of cancer, particularly non-Hodgkin's lymphoma, and its more widespread use is envisaged, including for arthritis treatment. Lu-177 and Y-90 are becoming the main RNT agents.