Identify the incorrect statement from the following:

Lanthanoids reveal only +$\displaystyle 3$ oxidation state.

The lanthanoid ions other than the $\displaystyle f^0$ type and the $\displaystyle f^{14}$ type are all paramagnetic.

The overall decrease in atomic and ionic radii from lanthanum to lutetium is called lanthanoid contraction.

Zirconium and Hafnium have identical radii of $\displaystyle 160$ pm and $\displaystyle 159$ pm, respectively as a consequence of lanthanoid contraction.