How to say "well done" or "correct answer" for a specific question within a randomised block

In my questionnaire I have some reading for the participants to do then 3 questions are presented that I am asking to ensure they understand everything so far. Its important that the questions are randomised. But I also need to have a message that comes up when they give the correct answer. This is easy enough to do for an incorrect answer with the custom validation section and then display an error message but there is no option to display a message on the correct answer. Because the questions are randomised it won't let me use display logic to just show another question that says "Well done, that is correct" or similar. This anyone know a way to present a correct response for particular questions within a randomised block? Thanks in advance 😀