According to molecular orbital (MO) theory, number of species/ions from the following having identic

Question

According to molecular orbital (MO) theory, number of species/ions from the following having identical bond order as that of $\mathrm{CN}^{-}$is $\mathrm{NO}^{+}, \mathrm{O}_{2}, \mathrm{O}_{2}^{+}, \mathrm{O}_{2}^{2+}, \mathrm{O}_{2}^{-}, \mathrm{N}_{2}^{+}$\

Professor PC Thomas Classes · Answer

(a) :