Which statement about the shapes of complex ions or molecules is not correct?
[Cr(C2O4)3]3−[\text{Cr}(\text{C}_2\text{O}_4)_3]^{3-}[Cr(C2O4)3]3− is octahedral.
[Ag(NH3)2]+[\text{Ag}(\text{NH}_3)_2]^{+}[Ag(NH3)2]+ is linear.
[Pt(NH3)2Cl2][\text{Pt}(\text{NH}_3)_2\text{Cl}_2][Pt(NH3)2Cl2] is tetrahedral.
[CuCl4]2−[\text{CuCl}_4]^{2-}[CuCl4]2− is tetrahedral.