to pending applicant
If you are not "pending" why do you need AP ?
I personally wrote "Ajustment to permanent residency" which worked fine for me and my wife. Note, that I also have a valid O-1 visa (similar to H1B) which is NOT stamped in my passport. (Otherwise, I would need to go to my country, apply for a new visa, wait for some time and get it and then I don't need AP. Getting AP is much easier !)