The final solution contains -

A

$$[Pb(NH_3)_4]^{2+}$$ and $$[CoCl_4]^{2-}$$

B

$$[Al(NH_3)_4]^{3+}$$ and $$[Cu(NH_3)_4]^{2+}$$

C

$$[Ag(NH_3)_2]^{+}$$ and $$[Cu(NH_3)_4]^{2+}$$

D

$$[Ag(NH_3)_2]^{+}$$ and $$[Ni(NH_3)_6]^{2+}$$