Which statement about the shapes of ions is not correct?
[Cu(H2O)6]2+[\text{Cu}(\text{H}_2\text{O})_6]^{2+}[Cu(H2O)6]2+ is octahedral.
[PtCl4]2−[\text{PtCl}_4]^{2-}[PtCl4]2− is tetrahedral.
[CuCl4]2−[\text{CuCl}_4]^{2-}[CuCl4]2− is tetrahedral.
[Fe(C2O4)3]3−[\text{Fe}(\text{C}_2\text{O}_4)_3]^{3-}[Fe(C2O4)3]3− is octahedral.