Groups of radios, three ways
Note: some content on this page has had aria-hidden="true" added for more precise testing.
Using fieldset and legend
This sounds something like: "Red, radio button, 1 of 3, What's your favourite colour?, group"
Using divs
This sounds something like: "Red, radio button, 1 of 3"
Using div with role and aria-labelledby
This sounds something like: "Red, radio button, 1 of 3, What's your favourite colour?, group"