<input type='radio' id='radio-1' name='selector'>
<label for='radio-1'>radio 1</label>
<input type='radio' id='radio-2' name='selector'>
<label for='radio-2'>radio 2</label>
<input type='radio' id='radio-3' name='selector'>
<label for='radio-3'>radio 3</label>
<input type='radio' id='radio-4' name='selector'>
<label for='radio-4'>radio 4</label>