How to make a quiz where the same answers only count for one ---

I don't really know how to explain it, but it's when multiple answers are the same, and when guessed, they collectively only count as one answer, ig, even when more than one boxes are filled in.

Sort of like this quiz, where if you type 'England', three boxes are filled, but it only says that 1/26 answers were guessed.

How can I make a quiz like that?

Thanks!