MCQ
In the nuclear reaction ${ }_{88} \mathrm{Ra}^{226} \rightarrow \mathrm{X}+{ }_2 \mathrm{He}^4 \mathrm{X}$ is:
- A${ }_{90} \mathrm{Th}^{234}$
- B${ }_{91} \mathrm{~Pa}^{234}$
- C${ }_{86} \mathrm{Rn}^{222}$
- ✓$88 \mathrm{Rn}^{226}$
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