"This is the right phrase."
Translation:Αυτή είναι η σωστή φράση.
Thanks Troll! I did write πρόταση in DuoLingo, just made a typo when retyping in the forum.
OK, so πρόταση does mean sentence and not phrase, but I thought these two were synonyms. After checking, it turns out that it's not quite the case, a phrase being a simple collection of words, whereas a sentence requires a subject and a verb. I learnt something! Here are more details: https://www.eurocentres.com/blog/clause-phrase-sentence-learn-the-difference/