The lanthanide contraction is responsible for the fact that

Options

A. Zr and Y have about the same radius
B. Zr and Nb have similar oxidation state
C. Zr and Hf have about the same radius
D. Zr and Zn have the same oxidation sate

Answer

C

Explanation

Atomic radius of `Zr(Z = 40)` is 160 pm, while
Atomic radius of `Hf (Z = 72)` is 169 pm.