You can use formatting field as RadioButtons and "Submit" button.
" You are correct ! " or "Wrong answer! " is triggered from "Submit" button.
But probably you are interested to change sequence of the RadioButton answers - very typical for quizzes.
And mixed question sequence too.
And probably you need different layouts for teacher and student.
I'm not sure (I cannot remember all) but probably I have published some solution HERE.
If not - email me and I'll upload sample.