Which of the following  characteristics of lanthanide is correct ?

Reducing property of them decreases from $\text{'}LatoLu\text{'}$

Lanthanides form stable compounds only in +3 oxidation state 

Complex forming ability of them increases from $\text{'}LatoLu\text{'}$

Basic nature of oxides  and hydroxides of them increases from  $\text{'}LatoLu\text{'}$