The correct option is A False
Ionic radii for Sc2+ and Ti2+ are not even defined! Similar to the atomic radii, there is no proper trend in ionic radii either. For V2+ the ionic radius is 79 pm and for both Cr2+ andMn2+, the ionic radii are 82 pm. From Mn2+ to Ni2+, there is a minor but gradual decrease. From there the ionic radii for Cu2+ and Zn2+ increases!