Identify the incorrect statement from the following.

• A

  All the five $4\mathrm{d}$ orbitals have shapes similar to the respective $3\mathrm{d}$ orbitals.
• B

  In an atom, all the five $3\mathrm{d}$ orbitals are equal in energy in free state.
• Correct answer
  C

  The shapes of ${\mathrm{d}}_{\mathrm{xy},} {\mathrm{d}}_{\mathrm{yz}}$, and ${\mathrm{d}}_{\mathrm{zx}}$ orbitals are similar to each other; and ${\mathrm{d}}_{{\mathrm{x}}^2-{\mathrm{y}}^2}$ and ${\mathrm{d}}_{{\mathrm{z}}^2}$ are similar to each other.
• D

  All the five $5\mathrm{d}$ orbitals are different in size when compared to the respective 4d orbitals.

Hence, the correct answer is option: 'C'.