Bonding in which of the following diatomic molecule(s) become(s) stronger, on the basis of MO Theory, by removal of an electron ?

(A) $\mathrm{NO}$
(B) ${\mathrm{N}}_2$
(C) ${\mathrm{O}}_2$
(D) ${\mathrm{C}}_2$
(E) ${\mathrm{B}}_2$

Choose the most appropriate answer from the options given below :-

Bond strength $\propto$ Bond order 

removal of electron from antibonding Molecular  Orbital increases Bond.Order.
$\mathrm{NO}\&{\mathrm{O}}_2$ has valence e- in ${\mathrm{\pi }}^{*}$ orbital.

Bond order of NO = 2.5 ,Bond order of NO⁺ = 3

Bond order of O₂ = 2,Bond order of O ₂ ⁺ = 2.5