You need either H1 visa or AP
If you apply H1, what you get is H1B approval notice, which is not good for you to re-enter US. Since you have I485 pending, you can get AP for coming back to US.
If you apply H1, what you get is H1B approval notice, which is not good for you to re-enter US. Since you have I485 pending, you can get AP for coming back to US.