A radioactive nucleus \(\frac{A}{Z}\) X undergoes spontaneous decay in the sequence
\(\frac{A}{Z}X{ \to _{Z - 1}}B{ \to _{Z - 3}}B{ \to _{Z - 2}}D\), where Z is the
atomic number of element X. The possible decay particles in the sequence are :
1
β−, α, β+
2
α, β−, β+
3
α, β+, β−
4
β+, α, β−
5
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