Identify the incorrect statement among the following `:`
A. Shielding power of 4f electrons is quite weak
B. There is a decrease in the radii of the atoms or ions as one proceeds from La to Lu
C. Lanthanoid contraction is the accumulation of successive shrinkages
D. As a result of lanthanoid contraction, the properties of4d series of the transiton elements have no similarities with the 5d seriesof the elements.
