Evolutive Form with Formbuilder

Hi, i would like to create a form with this architecture with formbuilder:

Question has to be an object with several attribute
Option has to be an object with several attribute

I begin in angular and ionic so i don’t know how manage to do it properly with validation form and display error, i saw that there is some things like ControlArray and ControlGroup but i don’t know how use it.
Does anyone has any idea of create this kind of form ?

The Angular2 forms docs and this piece are good places to start.

I have already read this but it’s to basic for what i need, in fact i have something almost working but i can’t validate the options :stuck_out_tongue: that’s why i create a topic here to see if someone has already did this. I posted something similar in stack

I am expecting your answer