Consider the following species : CN+,CN-,NO and CN . Which one of these will have the highest bond order?

NO:(σ1s)2,σ⋆1s2,(σ2s)2,σ*2s2,σ2pz2,π2px2=π2py2,π⋆2px1=π⋆2py0 B. O.=10-52=2.5CN-:(σ1s)2,σ⋆1s2,(σ2s)2,σ*2s2,π2px2=π2py2,σ2pz2 B.O. =10-42=3CN:(σ1s)2,σ⋆1s2,(σ2s)2,σ⋆2s2,π2px2=π2py2,σ2pz1B.O·=9-42=2.5CN+:(σ1s)2,σ⋆1s2,(σ2s)2,σ⋆2s2,π2px2=π2py2 B.O. =8-42=2 Hence, CN-has highest bond order.