1.Four diatomic species are listed below. Identify the correct order in which the bond order is increasing in them.a.NO<O2<C22−<He+\text{NO} < \text{O}_2 < \text{C}_2^{2-} < \text{He}^+NO<O2<C22−<He+b.O2<NO<C22−<He+\text{O}_2 < \text{NO} < \text{C}_2^{2-} < \text{He}^+O2<NO<C22−<He+c.C22−<He+<O2<NO\text{C}_2^{2-} < \text{He}^+ < \text{O}_2 < \text{NO}C22−<He+<O2<NOd.He+<O2<NO<C22−\text{He}^+ < \text{O}_2 < \text{NO} < \text{C}_2^{2-}He+<O2<NO<C22−Login to continueOnly logged in users canattempt or see the solution.