how can i make both radio buttons and option?

Hi,

If you click on the radio button field in the form builder, then click on the little gear in the top right corner of the field, it will bring up the options for that field.  In those options you can select the "Allow Other" option to allow for the "Other" input option to show for that field:

If you have any further questions, let us know and we will be happy to help.