Which of the following statements is not correct form the view point of molecular orbital theory ?
A. `Be_(2)` is not a stable molecule
B. `He_(2)` is not stable but `He_(2) ^(+)` is expected to exist
C. Bond strength of `N_(2)` is maximum amongst to
homonuclear diatomic molecular belonging to
the second period
D. The order of energies of molecular obitals in
`N_(2)` molecule is
` sigma 2slt sigma^(**) 2s lt sigma 2p_(z) lt (pi 2p_(x) = pi 2p_(y))`
`lt (pi^(**) 2p_(x) = pi^(**) 2p_(y)) lt sigma^(**) 2p_(z)`