There are some species given below :-
(a)O⁺₂ (b)CO
(c)B₂ (d)O⁺₂
(e)NO⁺ (f)He⁺₂
(g)C⁺²₂ (h)CN⁻
(i)N⁻₂
Total no. of species which have their fractional bond order.
A.3
B.4
C.5
D.6