Pomegranates are one of the oldest cultivated fruits, so they’re somewhat plausible, but I’m fairly certain humans made oranges (and most other citruses, through selection and grafting… though I guess it could have been a mandarin, pomelo, or citron, which seem to be the three we started with) and bananas (through selection and cloning), so it couldn’t have been those.

Apples, on the other hand, seem to have existed long before humans, so they’re definitely a possibility.

It was probably some kind of nut, though.