HTML5 การใช้งาน select Tag

<label for="choices">Choose an option:</label>
<select id="choices" name="choices">
  <option value="option1">Option 1</option>
  <option value="option2">Option 2</option>
  <option value="option3">Option 3</option>
</select>

<form>
  <label for="cars">Choose a car:</label>
  <select id="cars" name="car">
    <option value="volvo">Volvo</option>
    <option value="saab">Saab</option>
    <option value="mercedes">Mercedes</option>
    <option value="audi">Audi</option>
  </select>
</form>

<form>
  <label for="fruits">Choose your favorite fruits:</label>
  <select id="fruits" name="fruits" multiple>
    <option value="apple">Apple</option>
    <option value="banana">Banana</option>
    <option value="orange">Orange</option>
    <option value="mango">Mango</option>
  </select>
</form>

<form>
  <label for="numbers">Choose a number:</label>
  <select id="numbers" name="numbers" size="3">
    <option value="one">One</option>
    <option value="two">Two</option>
    <option value="three">Three</option>
    <option value="four">Four</option>
    <option value="five">Five</option>
  </select>
</form>

<form>
  <label for="food">Choose a food item:</label>
  <select id="food" name="food">
    <optgroup label="Fruits">
      <option value="apple">Apple</option>
      <option value="banana">Banana</option>
    </optgroup>
    <optgroup label="Vegetables">
      <option value="carrot">Carrot</option>
      <option value="broccoli">Broccoli</option>
    </optgroup>
  </select>
</form>

<form action="/submit" method="post">
  <label for="transport">Choose your transport:</label>
  <select id="transport" name="transport">
    <option value="bike">Bike</option>
    <option value="car">Car</option>
    <option value="bus">Bus</option>
  </select>
  <input type="submit" value="Submit">
</form>

<option value="car" selected>Car</option>

<select disabled>
  <option value="option1">Option 1</option>
</select>

<option value="option1" disabled>Option 1</option>