The wrong statement regarding transition metals among the following is:

Options

A. 4s electrons penetrate towards the nucleus more than 3d electrons.
B. atomic radii of transition metla increase rapidly with increase in atomic number because of poor shielding of nuclear attraction by (n-1)d electrons
C. second and third transtion series elements have nearly the same size.
D. Theirr densities are ghiher and densities of the 5d series elements are higher than those of 4d series elements.

Answer

B