The correct stability order of the following resonance structure is:
₋ ₊
(I) H₂C - N = N
₊ ₋
(II) H₂C - N = n
₊ ₋
(III) H₂C - N = n
₋ ₊
(IV) H₂C - N = n

a. (I) > (II) > (I) > (III)
b. (I) > (III) > (II) > (IV)
c. (II) > (I) > (III) > (IV)
d. (III) > (I) > (IV) > (II)