Material Design 3 Radio button.
Radio buttons allow users to select one option from a set.
import 'material/radio/radio.js'<md-radio name="group" value="1" checked></md-radio>
<md-radio name="group" value="2"></md-radio>
<md-radio name="group" value="3"></md-radio>
<!-- Disabled -->
<md-radio name="group" value="4" disabled></md-radio>