| Answer | Crossword Clue |
|---|---|
| OPEC | Nigeria is its most populous member |
| APPALACHIA | Pittsburgh is its most populous city |
| SAMOA | Its most populous island is Upolu |
| BENIN | Cotonou is its most populous city |
| ROMANIA | Cluj is its second-most populous city |
| USA | Most populous NATO member |
| INDIA | Most populous member of the British Commonwealth |
