In the following transition metals, the maximum number of oxidation states are exhibited by

Which of the following transition metals show the maximum oxidation state ?

Which of the following transition metals displays maximum number of oxidation states?

Give examples and suggest reasons for the following features of the transition metals. The highest oxidation state is exhibited in oxoanions of a metal.

Given example and suggest reasons for the following features of the transition metal : The highest oxidation state is exhibited in oxoanions of a metal.