Identify the correct decreasing order of atomic radii from the following.

Which one of the following statements concerning lanthanide elements is false?

Which of the following elements are analogous to the lanthanides?

Which element from the following has the largest ionic size in the $+3$ state?

Identify all the correct statements for Lanthanide contraction.
$(A)$ The covalent properties of the Lanthanide metal hydroxides increase from $La$ to $Lu$.
$(B)$ The chemical reactivity decreases from $La$ to $Lu$.
$(C)$ $La(OH)_3$ is more basic than $Lu(OH)_3$.
$(D)$ $Zr$ and $Hf$ have about the same radius.
$(E)$ Separation of Lanthanides from one another is easy.

The element californium belongs to the family of