Which is an isotope of ²⁴Mg?

A.     $_{{\text{11}}}^{{\text{24}}}{\text{Na}}$

B.     $_{{\text{21}}}^{{\text{24}}}{\text{M}}{{\text{g}}^{2 + }}$

C.     $_{{\text{12}}}^{{\text{26}}}{\text{Mg}}$

D.     $_{{\text{10}}}^{{\text{22}}}{\text{Ne}}$

C