Response to multiple choice questions

Hi

Can anyone tell me how to do the following please?

I am running an experiment and in the questionnaire -
A video clip plays and the user has to choose from one of 4 multiple choice answers to a question posed.

Depending on the answer chosen (i.e. 1-4) I want to give them a feedback message. How do I do this?

e.g. for a correct answer - it will say well done & go to the next clip.
for an incorrect answer - it will give them a clue - and then go back to the question so that they can try again from the 4 choices.

Can you please advise me how to do this as this a crucial step in my research project!!

Thank you VERY much in advance!!