How can we use the <select> tag in HTML5 ?

Question

It'd be like this
<select>
"here what?"
</select>

Answer 1

<select>
<optgroup>
<option>
Text
</option>
</optgroup>
</select>

<optgroup>is optional

Answer 2

The select tag is used inside the form tag to create a drop down list.
It is used like this,
<form >
<select name="abc" id="xyz">
<option value="any name">any name</option>
</select>
</form>

Answer 3

<select>
<option value = "0">xyz</option>
</select>

Answer 4

Thanks everybody that was really useful