Which of the following d-orbitals does not participate in hybridizationfor the central atom of IF7?

The sp3d3 hybridization has a pentagonal bipyramidal geometry i.e… five bonds in a plane, one bond above the plane and one below it. So to achieve such geometry we need to choose orbitals in such a way that five of them are in one plane and two in planes and two in planes perpendicular to it we have one S Orbital-SThree P Orbitals - pxpypz  and five d-orbital−dxy  dyz  dxz  dx2−dy2  dz2  .The only possible combination in which 5 are in a plane and 2 above it is in which Spxpypz−dxy  dyz  dxz  dx2−dy2  dz2 are in xy plane and pz2 and dz2 perpendicular to it, So the d Orbitals being used are dxy  dx2−dy2  dz2