The resonating structures of cyanate ion are `O=C=overset(1-)(N)harroverset(1-)(O)-C-=Nharroverset(1+)-=C-overset(2-)(N)` . The correct set of oxidation states of O, C and N respectively with the most stable structure out of the above is :
A. (i) `-3,+4,-2`
B. (ii)`-2,+4,-3`
C. (iii)`-1,+4,-3`
D. (i)`0,+4,-5`
