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| $(A)$. $^{24}_{12}Mg$ | $(I)$. $5$ |
| $(B)$. $^{27}_{13}Al$ | $(II)$. $12$ |
| $(C)$. $^{9}_{4}Be$ | $(III)$. $6$ |
| $(D)$. $^{12}_{6}C$ | $(IV)$. $14$ |
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