Radioactive Decay: Group Displacement Law

2001 AIPMT 1 question

1. 1 Nuclear Chemistry Medium
   If a species ${}^{b}_{a}X$ emits firstly a positron, then two $\alpha$ and two $\beta$ particles and at last one $\alpha$ is also emitted and finally it converts into stable species ${}^{c}_{d}Y$, so correct relation will be : -
   A c = b – 12, d = a – 5 B a = c – 8, d = b – 1 C a = c – 6, d = b – 0 D a = c – 4, d = b – 2
   Check Answer