Show dropdown menu on hover of anchor tag
<p>I have following ul and li structure and on hover of anchor tag I want to show ul items as dropdown menu.
    <ul>
            <li>
                What's new
                <ul>
                    <li>List Item One</li>
                    <li>List Item One</li>
                    <li>List Item One</li>
                    <li>List Item One</li>
                    <li>List Item One</li>
                </ul>
            </li>
        </ul>
But I am not able to get any css code.So please help me to write the css code.</p>