Sometimes it might be better to not divulge that information, but at Western they don't seem to care. Obviously you don't have to be honest because they don't have access to your AMCAS application, but if they somehow find out you weren't being honest, well heh...
I would just be honest and explain where you applied, why, etc...
Personal anecdote: When I interviewed (oh so long ago), my interviewer (one of the most traditional osteopaths on staff) asked where I applied and I simply told him: ~43 MD, 1 post-bacc, 1 DO. That didn't seem to affect the decision process since I'm drudging through 2nd year now.
Your mileage may vary.
Good luck!