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

The shapes of the first two orbitals in the above sequence are similar, but that of the fourth and fifth orbitals are different.

The shapes of all five $\mathrm{d}-$orbitals are similar.

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