A. ${ }_{5}^{10} \mathrm{~B}$ i ${ }_{5}^{11} \mathrm{~B}$
C. ${ }_{33}^{69} \mathrm{As}$ i ${ }_{33}^{74} \mathrm{As}$
B. ${ }_{31}^{69} \mathrm{Ga} \mathrm{i}{ }_{32}^{74} \mathrm{Ge}$
D. ${ }_{34}^{82} \mathrm{Se} \mathrm{i}{ }_{36}^{82} \mathrm{Kr}$
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