Diagram 9-1 the Molecular Orbital Diagram Below May Be Used $\sigma$

Multiple Choice

Diagram 9-1 The molecular orbital diagram below may be used for the following problem(s) .For oxygen and fluorine,the $\sigma$ _2p orbital should be lower in energy than the $\pi$ _2p orbitals.However,the diagram will still yield correct bond order and magnetic behavior for these molecules.
-Refer to Diagram 9-1.Assuming that the molecular orbital energy diagram for a homonuclear diatomic molecule applies to a heteronuclear diatomic molecule,determine which of the following species is paramagnetic.

A) NO⁺
B) CO
C) CN^-
D) OF^-
E) NO