Automatic answers according to the answers of the form


I would like to create a form on my site with multi choice questions. Depending on the answers, I would like to show a different message.
For example, if the respondent answered A to question 1 and C to question 2 : automatic answer 1.
If he answered B to question 1 and A to question 2 : automatic answer 2.

I imagine that it is code to insert in the page of my site, but I do not know the formulation.
Can someone help me?
I hope it’s clear, thanks!

Here is my site Read-Only: LINK
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