The dropdown can’t show selected item in form update. But the code has the same as other dropdown

1. The code below can show the selected item on dropdown

  <div class="col-md-3 pl-pr-1">
     <div class="form-group">
         <label>Dry Process</label>
         <?php $dry = $u->dry; ?>
         <select name="dry" id="dry" class="form-control" required> 
         <option selected disabled>Pilih</option>
         <option <?php echo ($dry == 'Line Dry/Flat Dry') ? "selected": "" ?>>Line Dry/Flat Dry</option>
         <option <?php echo ($dry == 'Tumble Dry') ? "selected": "" ?>>Tumble Dry</option>
         <option <?php echo ($dry == 'All') ? "selected": "" ?>>All</option>
         <option <?php echo ($dry == 'None') ? "selected": "" ?>>None</option>
         </select>
     </div>
 </div>

2. The code below can’t show the selected item on dropdown

 <div class="col-md-3 pl-pr-1">
    <div class="form-group">
        <label>Technology Concept</label>
        <?php $technology_concept = $u->technology_concept; ?>
        <select name="technology_concept" class="form-control" required>
            <option selected disabled>PILIH</option>
            <option <?php echo ($technology_concept == 'TECHFIT') ? "selected": "" ?>>TECHFT</option>
            <option <?php echo ($technology_concept == 'TECHFIT RECHARGER') ? "selected": "" ?>>TECHFIT RECHARGER</option>
            <option <?php echo ($technology_concept == 'CONTROL') ? "selected": "" ?>>CONTROL</option>
            <option <?php echo ($technology_concept == 'FORMOTION') ? "selected": "" ?>>FORMOTION</option>
            <option <?php echo ($technology_concept == 'none') ? "selected": "" ?>>none</option>
        </select>
    </div>
</div>

I’ve tried nothing in code just recheck with the code before for make sure the code has same with other code. But it still can’t selected the dropdown item on update.