What are the commonly observed oxidation states of cobalt found in the various forms of vitamin B₁₂? A)+1, +2, +3 B)+1, +3, +5 C)+2, +3, +5 D)+3, +4, +5 E)+3, +5, +6

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Cobalt in vitamin B12 (cobalamin) primarily exhibits the +3 oxidation state, but it can also exist in the +1 and +2 states under certain conditions, making these the commonly observed oxidation states for cobalt in this context.

What Are the Commonly Observed Oxidation States of Cobalt Found