
          <option value="4">Option 4</option>
          <option value="5">Option 5</option>
          <option value="6">Option 6</option>
        </optgroup>
        <optgroup label="Group 3">
          <option value="7">Option 7</option>
          <option value="8">Option 8</option>
          <option value="9">Option 9</option>
        </optgroup>
      </select>
    </div>
  </div>

  <div class="mb-3 row">
    <label class="col-sm-2">
      Multiple Select
    </label>

    <div class="col-sm-10">
     