[washey]

Which of these is not a valence bond concept?

-lone pair electrons are in atomic orbitals or in hybrid atomic orbitals.

-atomic orbitals on two atoms may overlap to form antibonding orbitals.

[tamim83]

Here is a hint: one of these statements refer to Molecular Orbital theory, one refers to Valence Bond theory.  Think about the assumptions and mechanics of both NO and VB theory to distinguish these two statements

[washey]

From what I can gather the second statement is from the MO theory, but I can't find it word for word in my book. If I can't find it in my book, I look for something else to back me up. That being every diagram of an MO shows an orbital surrounding both atoms.

[Bioionic]

http://en.wikipedia.org/wiki/Antibonding

[tamim83]

You may not find the statement "word for word", but you can look at the different terms used.  "Anti-bonding" orbitals are a product of MO theory, these don't exist in VB theory