How do I create an exercise/quiz using drop-down menus?

Hi,

I've used Mike Taylors blog to create my own version of this type of slide, but I think I'm getting ahead of myself (Being a bit of a newbie)...

I've changed it to have three different drop down Q&A's on the same slide, and I was hoping to make it so that when the user has selected their three answers and clicked the submit button, they would get a box underneath each and all of their responses telling them if they had it right or wrong before scoring the answer moving onto the next question.

I'm getting a bit bogged down by it, trying to work out all the different layers and triggers. Am I barking up the wrong tree here? should I keep it simple and do three seperate slides, or is there a better way?

The attached slide is the one I have been trying to work it out on..