[HTML] select 특정 option 비활성화

<!-- 1. select 기본 -->
<select>
  <option value="">선택안함</option>
  <option value="1">선택1</option>
  <option value="2">선택2</option>
  <option value="3">선택3</option>
</select>

<!-- 2. select 특정 option 비활성화 -->
<select>
  <option value="" selected disabled hidden>선택안함</option>
  <option value="1">선택1</option>
  <option value="2">선택2</option>
  <option value="3">선택3</option>
</select>