<select id="teamRank" required>
  <option value="">Seçiniz</option>

  <optgroup label="Demir">
    <option value="iron1">Demir 1</option>
    <option value="iron2">Demir 2</option>
    <option value="iron3">Demir 3</option>
  </optgroup>

  <optgroup label="Bronz">
    <option value="bronze1">Bronz 1</option>
    <option value="bronze2">Bronz 2</option>
    <option value="bronze3">Bronz 3</option>
  </optgroup>

  <optgroup label="Gümüş">
    <option value="silver1">Gümüş 1</option>
    <option value="silver2">Gümüş 2</option>
    <option value="silver3">Gümüş 3</option>
  </optgroup>

  <optgroup label="Altın">
    <option value="gold1">Altın 1</option>
    <option value="gold2">Altın 2</option>
    <option value="gold3">Altın 3</option>
  </optgroup>

  <optgroup label="Platin">
    <option value="platinum1">Platin 1</option>
    <option value="platinum2">Platin 2</option>
    <option value="platinum3">Platin 3</option>
  </optgroup>

  <optgroup label="Elmas">
    <option value="diamond1">Elmas 1</option>
    <option value="diamond2">Elmas 2</option>
    <option value="diamond3">Elmas 3</option>
  </optgroup>

  <optgroup label="Yücelik">
    <option value="ascendant1">Yücelik 1</option>
    <option value="ascendant2">Yücelik 2</option>
    <option value="ascendant3">Yücelik 3</option>
  </optgroup>

  <optgroup label="Ölümsüzlük">
    <option value="immortal1">Ölümsüzlük 1</option>
    <option value="immortal2">Ölümsüzlük 2</option>
    <option value="immortal3">Ölümsüzlük 3</option>
  </optgroup>

  <optgroup label="Radyant">
    <option value="radiant">Radyant</option>
  </optgroup>
</select>