HTML Dropdwon option. Select an option is displayed, but is disabled when dropdown mode is activated. Meaning you have to give a valid option

dropdown.html

<label for="job-size">How did you hear about us?
    <select id="dropdown">
        <option disabled="disabled" selected="selected">Select an option</option>
        <option value="1">NewsPaper</option>
        <option value="2">Facebook</option>
        <option value="1">Word of mouth</option>
        <option value="2">other</option>
    </select>
</label>