• Radio buttons are used when you want to let the visitor select one - and just one -
option from a set of alternatives. If more options are to be allowed at the same time
you should use check boxes instead.
• The name setting tells which group of radio buttons the field belongs to. When you
select one button, all other buttons in the same group are unselected.
If you couldn't define which group the current button belongs to, you could only have
one group of radio buttons on each page.
• The value setting defines what will be submitted if checked.