How to create a geography quiz

It looks like that quiz is a collection of Freeform Pick One questions.

To create each question, you'd need a slide that has these objects: 

• A freeform transparent shape that is drawn to match the outline of the country that is "correct" for that slide. 
• A rectangle that covers the rest of the map, which would be the "wrong" thing to click. Be sure this is below the "correct" shape.
• The map of Europe
  • This would be best on the Master slide. That would ensure it stays in the same position.

With those elements in place on a regular slide, you'd convert the slide to a Freeform Pick One,  indicate which objects are clickable, and which one correct.

Here's more info about Freeform slides:

https://community.articulate.com/series/articulate-storyline-360/articles/articulate-storyline-360-user-guide-how-to-convert-existing-slide-to-freeform-interaction