Insert a hidden field to the selected form. Double click the inserted hidden field to open the Form Hidden Field Properties Dialog to change properties. Though only one hidden field is shown on the form, multiple hidden values can be added through the dialog. So, instead of adding many hidden fields to the form, you can add just one hidden field and add many value pairs.
Group all the selected radio buttons to a single group. A popup dialog will be opened for entering a name which will then be assigned to the name of all the selected radio buttons. So, there will only be one radio button can be selected within this group.