what is the oxidation state of cobalt(iii)?\na. +2\nb. -3\nc. +3\nd. +5

what is the oxidation state of cobalt(iii)?\na. +2\nb. -3\nc. +3\nd. +5
Answer
Brief Explanations:
In chemical nomenclature, the Roman - numeral in parentheses after an element's name indicates its oxidation state. Cobalt(III) means the oxidation state of cobalt is +3.
Answer:
C. +3