Per Romans 15:26, which two regions made a contribution for the poor saints in Jerusalem?

Answer: Macedonia and Achaia

Paul was taking a gift to Jerusalem, for Macedonia and Achaia were pleased to contribute for the poor among the saints there.

“Now, however, I am on my way to Jerusalem to serve the saints there. For Macedonia and Achaia were pleased to make a contribution for the poor among the saints in Jerusalem.”— Romans 15:25-26 (BSB)