It seems like you are comparing various compounds containing iron (Fe). In terms of decreasing oxidation states of iron, the correct order should be:
Fe(III) > Fe(III)Ce2 > Fe(II)Ce2 > Fe(II) > Fe(OH)2 > FeO > Fe
This is the order from highest oxidation state to lowest oxidation state.
It seems like you are comparing various compounds containing iron (Fe). In terms of decreasing oxidation states of iron, the correct order should be:
Fe(III) > Fe(III)Ce2 > Fe(II)Ce2 > Fe(II) > Fe(OH)2 > FeO > Fe
This is the order from highest oxidation state to lowest oxidation state.