Question

Match List 1 with List 2 :

Answer 1

${}^{60m}\text{Co}$ is a $\gamma$-emitter and is used in cancer therapy.
${}_{90}^{234}\text{Th}$ is a $\beta$-emitter.
${}_6^{14}\text{C}$ is a $\beta$-emitter.
${}_{90}^{232}\text{Th}series$ is a $\beta$-emitter and $\alpha$-emitter.
This leads to branching decay in series and emenation.