The radio buttons are contained in or owned by an element with role radiogroup.
Each radio button element has role radio.
If a radio button is selected, the radio element has aria-checked set to true. If it is not selected, it has aria-checked set to false.
Each radio element is labelled by its content, has a visible label referenced by aria-labelledby, or has a label specified with aria-label.
The radiogroup element has a visible label referenced by aria-labelledby or has a label specified with aria-label.
If elements providing additional information about either the radio group or each radio button are present, those elements are referenced by the radiogroup element or radio elements with the aria-describedby property.