Answer: Option B , Reduced
Explanation:
Since oxidation number of Ni in Ni+2 is +2 and it is reduced to +1 and zero by gaining of Electrons.
2 moles of Ni+2 reduced from+2 to +1
state by gaining of 1 electron per each mole and another mole of Ni+2 reduced from +2 zero oxidation state by gaining of 2 electrons
