<!-- body closes head -->
<head>
    <title>Title
<body>

    <!-- option and optgroup -->
    <select>
        <option>1
        <option>2
            
        <optgroup label="Group 1">
            <option>1
            <option>2
                
        <optgroup label="Group 2">
            <option>1
            <option>2
    </select>