components/radioGroup/radio-group.html

<div class='sdc-radio-group'>
    <label class='sdc-radio-group__legend'>Group C</label>
    <div class='sdc-radio-group__radios'>
        <div class="sdc-radio">
            <input type="radio" name="grp3" class="sdc-radio__input" value="1">
            <label class="sdc-radio__label">option 1</label>
        </div>
        <div class="sdc-radio">
            <input type="radio" name="grp3" class="sdc-radio__input" value="2">
            <label class="sdc-radio__label">option 2</label>
        </div>
    </div>
</div>