Yes and no...
If you mean " Can I install one 2" PVC run, top it off with a F/A and a hefty 2" BX 2-screw connector and run all of my Romex down it in one neat tidy run."
Then the answer is no -- because the BX connector is listed for AC and MC of various sizes -- not a gangle of Romex.
If you mean " I want to bring my feeder down into my panel using a short terminal run of PVC, F/A, and BX connector."
Then the answer is yes.
