A) \[_{92}{{U}^{238}}\xrightarrow{{}}{{\,}_{90}}T{{h}^{234}}\]
B) \[_{90}T{{h}^{232}}\xrightarrow{{}}{{\,}_{88}}R{{a}^{228}}\]
C) \[_{88}R{{a}^{226}}\xrightarrow{{}}{{\,}_{86}}R{{n}^{222}}\]
D) \[_{83}B{{i}^{213}}\xrightarrow{{}}{{\,}_{84}}P{{o}^{213}}\]
Correct Answer: D
Solution :
It is occurs by \[\beta \]-decay.
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