How to show multiple forms conditionally?

I am looking to create subforms based on a condition from one field.  For example, the field would have a pull down with three options(A, B, C), based on which one is selected, a subform would pull up. I understand this has something to do with conditions and show/hide field, but I am unable to find detailed instructions for how to accomplish this.  Do I build the form first or set the conditions first? Any detailed steps in setting up 3-4 subforms within the parent form would be helpful.

You can achieve that with iFrame embed widget and conditional logic.

Here is how:

1) Add iFrame widget for each form:

2) And then create a condition that will reveal the forms based on what is selected:

You can check my test form: https://form.jotform.com/82275622751963

Let us know if that could work for you.

Thank you!