HTML

default select option

<select>
  <option value="" selected disabled hidden>Choose here</option>
  <option value="1">One</option>
  <option value="2">Two</option>
  <option value="3">Three</option>
  <option value="4">Four</option>
  <option value="5">Five</option>
</select>

select option default value

      <select defaultValue={'DEFAULT'} >
        <option value="DEFAULT" disabled>Choose a salutation ...</option>
        <option value="1">Mr</option>
        <option value="2">Mrs</option>
        <option value="3">Ms</option>
        <option value="4">Miss</option>
        <option value="5">Dr</option>
      </select>

select default value

<option selected>
5
</option>

html select default value

<option selected="selected">
3
</option>

html select default

<label for="cars">Choose a car:</label>
<select name="cars" id="cars">
  	<option value="volvo">Volvo</option>
    <option value="saab" selected>Saab</option>
</select>