Which one of the following species is diamagnetic in nature
He2+
H2
H2+
H2-
He2+H2H2+H2− σ(1s)↑↓_↑↓↑↓_↓ σ(1s)↑1 −1¯↑1 B.O. 1211222 Magnetic PDPP nature
(P = Paramagnetic, D = Diamagnetic)