<!-- Host Status -->
            <td><select name='dropdown_settings[select_field_0]'>
    <option value='1' <?php selected( $options['select_field_0'], 1 ); ?>>Option 1</option>
    <option value='2' <?php selected( $options['select_field_0'], 2 ); ?>>Option 2</option>
    <option value='3' <?php selected( $options['select_field_0'], 3 ); ?>>Option 3</option>
    <option value='4' <?php selected( $options['select_field_0'], 4 ); ?>>Option 4</option>
</select></td>