In which pair of atoms is the number of neutrons the same?
- A$^{59}_{27}\text{Co}$ and $^{59}_{28}\text{Ni}$
- B$^{64}_{29}\text{Cu}$ and $^{65}_{29}\text{Cu}$
- C$^{64}_{29}\text{Cu}$ and $^{65}_{30}\text{Zn}$
- D$^{65}_{29}\text{Cu}$ and $^{65}_{30}\text{Zn}$