$\begin{array}{1 1}(a)\;\text{dissociation energy of }N_2\text{=dissociation energy of }N_2^+\\(b)\;\text{dissociation energy of }N_2\text{ can either be lower or higher than the dissociation energy of }N_2^+\\(c)\;\text{dissociation energy of }N_2\text{> dissociation energy of }N_2^+\\(d)\;\text{dissociation energy of }N_2^+\text{> dissociation energy of }N_2\end{array} $