Stability of the species Li₂, Li₂⁻ and Li₂⁺ increases in the order of:

• Li₂ < Li₂⁺ < Li₂^-

• Li₂⁻ < Li₂⁺ < Li₂ 

• Li₂< Li₂⁻ < Li₂⁺

•  Li₂⁻ <Li₂< Li₂⁺

B.

Li₂⁻ < Li₂⁺ < Li₂ 

Li₂⁺ is more stable than Li₂⁻ because Li₂⁻ has more numbers of antibonding electrons.