HTML5 -Optionsgruppen

<select>
    <optgroup label="Member">
        <option value="Dashboard">Dashboard</option>
        <option value="Profile">Profile</option>
    </optgroup>
    <optgroup label="Admin">
        <option value="Security">Security</option>
        <option value="Settings">Settings</option>
    </optgroup>
</select>
Syntax Error