Radio buttons controls are used to ask the user a multiple choice question. Each radio button two components: a round button and a text label that indicates what pressing the button means.
Radio buttons are grouped using a groupbox control. When the user presses a radio button, it is selected and all other radio buttons in the group are unselected. As a result, only one item in the group may be selected at any time.
For yes/no questions, a checkbox control may be more intuitive.
The term "radio button" comes from car radios that have mechanical preset buttons. When you press one of these real radio buttons, it gets pushed in, the tuner changes to your selection, and all other buttons pop out.