This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: JIPMER 2018, Subject name: Radiology
[{'content': 'Half life of radioactive fluorine 18:- \nSelect and explain. \nA. 110 mins, B. 110 days, C. 110 secs, D. 110 hours', 'role': 'user'}, {'content': 'Answer: A \nExplanation: RADIOISOTOPE HALF UFE IODINE 131 8 DAYS IODINE 125 60 DAYS IODINE 124 4 DAYS IODINE 123 13 HOURS PHOSPHORUS-32 14 DAYS RADIUM(RA-226) 1622 Years Cobalt-60 5.2 Years Cesium -137 30 years TC-99m 6 hours Indium(lr-192) 74.5 Days 18F(18FDG) 110 Aim Strontium 89', 'role': 'assistant'}]