True statement among the following

Other high yielding pointsI127 is stable iodine isotopeI-131 Has half-life of 8 daysThe gamma-emitting isotopes iodine-123 (half-life 13 hours) used as nuclear imaging tracers to evaluate the anatomic and physiologic function of the thyroid. Iodine-125 is commonly used by radiation oncologists in low dose rate brachytherapy in the treatment of cancer at sites other than the thyroid, especially in prostate cancer. When I-125 is used therapeutically, it is encapsulated in titanium seeds and implanted in the area of a tumour, where it remains. The low energy of the gamma spectrum, in this case, limits radiation damage to tissues far from the implanted capsule. Iodine-125, due to its suitable longer half-life and less penetrating gamma spectrum, is also often preferred for laboratory tests that rely on iodine as a tracer that is counted by a gamma counter, such as in radioimmunoassaying