Identify the D orbital or orbitals with the highest energy in the complex shown below. Here we have zinc as our metal cation connected to 4 hydroxide ions. Doing this gives us an overall charge of 2 minus. Now the way that it's depicted shows that this is a tetrahedral complex, and with tetrahedral complexes the greatest interaction happens in between the axes.
Remember, the orbitals that lie in between the axes would be dxy, dyz and dxz. These remaining 2 are the ones that are along the axes or on the axes, so they would not have the greatest interaction. So AB and C are the correct orbitals, and because of that the answer would have to be option G.
So we're talking about AB and C as being the D orbitals with the highest energy in this tetrahedral complex.