Which of the following is true about transition metals?

A transition metal cation is always formed by removing the last electron that was placed in an orbital.
------------------------------------
 The multiple common ions that exist for some transition metal atoms (like ferrous and ferric ions) can be explained if the parent atom is diamagnetic.
--------------------------------------
 The multiple common ions that exist for some transition metal atoms (like ferrous and ferric ions) can be explained if the parent atom is paramagnetic.
-------------------------------
 Transition metal atoms can be paramagnetic if they have unpaired electron(s).