Half-life of Iodine 131 is

Half-life of Iodine 131 is
a) 8 hours
b) 8 days
c) 8 weeks
d) 8 months
Correct Answer - B
Answer- B. 8 days
Iodine - 131 Half life 8 days
Iodine - 123 -3 Half life 13 hours
Iodine - 132 Half life 2.3 hours