two different ajax subforms with one parent field

Hello,

Is it possible to define two different Ajax Subforms in one form with one parent field? I want to combine some information from two separate forms in another form to create a report and want to create a PDF document of it.

I have followed the steps at AJAX Subform and created the forms as follows:

Form A and Form C are used as the subforms. The form with the "Section" title is the form in which the Ajax Subform fields are defined.

Here in this form do I have to create two different fields as parent fields?

Is there a way to define two subforms for the select field which is used as the parent field?

Thanks for the help in advance.