Which of the following ions behave like reactive metal ions in producing ionic compounds?

• a$\mathrm{NH_4^+}$ and $\mathrm{PH_4^+}$
• b$\mathrm{Cl^-}$ and $\mathrm{SO_4^{2-}}$
• c$\mathrm{O^{2-}}$ and $\mathrm{S^{2-}}$
• d$\mathrm{NO_3^-}$ and $\mathrm{CO_3^{2-}}$