Which one of the following molecules is expected to exhibit diamagnetic behaviour?

C2(6+6=12)=σ1s2,σ1s2,σ2s2,σ2s2,π2px2≈π2py2Since, alt the electrons are paired it is a diamagnetic speciesN2+(7+7=14)=σ1s2,σ*1s2,σ2s2σ*2s2,π2px2≈π2py2,σ2pz1 It is paramagnetic species because of the presence of one unpaired electron.O2(8+8=16) or S2=σ1s2,σ*1s2,σ2s2,σ*2s2σ2pz2,π2px2≈π2py2π*2px1≈π*2py1 Due to the presence of two unpaired electrons O2 and S2 both are paramagnetic molecules.