`MO' s` are formed by the overlap of `A'O s` Two `AO's` combine to form two `MO's` called bonding molecular orbital `(BMO)` and antibonding molecular orbital `(ABMO)` Differnet `AO' s` of one atom combine with these `AO 's` of the second atom which have comparable energies and proper orienation Further, If the overlapping is head on, the `MO` is called 'pi' The `MO's` are filled with electrons following the same rules as followed for filling of atomic orbitals However the order of filling is not the same for all molecules or their ions Bond order is one of the most important parameter to compare a number of their characteristics
Which one of the following statements is correct .

Options

A. `BMO` is lowered by the same amount of energy by which `ABMO` is raised .
B. `BMO` is lowered by a greater amount of energy than the amount by which `ABMO` is raised .
C. `BMO` is lowered by less amount of energy than the amount by which `ABMO` is raised .
D. Any one of the above is possible .

Answer

C

Explanation

`AMBO` is raised more in energy than the energy by which `BMO` s are lowered as compared to the energy of combining `AO` s .