Yes/No question --> How to show which is correct answer?

for new people with the same problem I'd like to add: you have to save your question first. Then it will show up at the bottom. And, in my case, I then had to give the options and then save again and only then did the radio buttons show up so that I could pick the correct answer. Really missing proper guide and /or documentation for this. It should be easy to figure out but it isn't.

Daniel, I found it. By accident
It's at the bottom of the page. Did not see it there. Thanks for your screenshot. That was helpful because I then realized what it was supposed to look like!

I don't see this. Where exactly is this in the menu?

This is what I see when I create a question

I have worked with many quiz apps but this one confuses me a lot. I'm trying to make a simple quiz with yes/no options. In order to get a score I should be able to say what the right answer is, right? Well, where can I say what the correct answer is??