Increasing order of stability of the resonance structures is :


Choose the correct answer from the options given below :

Stability of resonating structures
$\mathrm{\alpha } \frac{1}{\mathrm{No}.\mathrm{of} \mathrm{charges}}$ 
$\mathrm{\alpha }$ No. of octet atoms (or) No. of covalent bonds
$\mathrm{\alpha }$ -ve / +ve charge stability
$\mathrm{\alpha }$ distance b/w charges
D is most stable as all atoms are octet.
C is least stable as oxygen has only 6e^- (Non-octet oxygen canonicals do not form)
Between A and B, A is less stable due to repulsions b/w L.P. of ‘N’ and ${\mathrm{C}}^{\mathrm{\Theta }}$
$\therefore$ Correct stability order is D > B > A > C
$\therefore$No answer