According to molecular orbital theory, electrons in a molecule are present in various molecular orbitals as electrons of atoms are present in atomic orbitals. The atomic orbitals of comparable energies and proper symmetry combine to form molecular orbitals. Linear combination of atomic orbitals (LCAO) has been adopted to explain formation of bonding M.O & antibonding M.O.
In M.O. diagram of `C_(2)` the CORRECT order(s) of energies of molecular orbital is/are (Assume internuclear axis as Z-axis)