Radioactive decay follows first order kinetics and the rate constant is often termed as decay constant. Certain radioactive substance may undergo sequential decays in order to convert into a stable necleus The series comprising all such elements is termed as radioactive disintegration series.
A radioactive series is formes such that after each `alpha` decay there are two consecutive `beta` decay and the cycle repeats How many different elements this series can have if there are 12 members in the series?
A. 12
B. 4
C. 3
D. 6
