<fieldset>
<legend>Como le gustaria que lo contactemos?</legend>
<label for="radio-email"><input type="radio" name="contacto" value="email" id="radio-email">Email</label>
<label for="radio-telefono"> <input type="radio" name="contacto" value="telefono" id="radio-telefono">Telefono</label>
<label for="radio-whatsapp"> <input type="radio" name="contacto" value="whatsapp" id="radio-whatsapp" checked>Whatsapp</label>
</fieldset>