Which one of the elements with the following outer orbital configurations exhibits the largest number of oxidation states?

Which one of the elements with the following outer orbital configurati

1.	Which one of the elements with the following outer orbital configurations exhibits the largest number of oxidation states?
Answer» `3d^3, 4s^2` `3d^5, 4s^1` `3d^5, 4s^2` `3d^2, 4s^2` ANSWER :C