The five d-orbitals are designated as ${\mathrm{d}}_{\mathrm{xy}},{\mathrm{d}}_{\mathrm{yz}},{\mathrm{d}}_{\mathrm{xz}},{\mathrm{d}}_{{\mathrm{x}}^2-{\mathrm{y}}^2}{\text{ and d}}_{{\text{z}}^{\text{2}}}$. Choose the correct statement

The shapes of all five d-orbitals are similar

The shapes of all five d-orbitals are different

The shapes of the first four orbitals are similar but that of the fifth orbital is different

The shapes of the first three orbitals are similar but that of the fourth and fifth orbitals are different