Testing

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>
    <script type="text/javascript">
    $(document).ready(function() {
      $("#genre1").change(function() {
        var str = $("#genre1 option:selected").val();
        $("#genre2 option[value='"+str+"']").remove();
        $("#genre3 option[value='"+str+"']").remove();
      });
    });
    </script>
</head>
<body>
    <label>Genre 1</label>
    <select id="genre1">
      <option value="Fighting">Fighting</option>
      <option value="Shooter">Shooter</option>
      <option value="Sport">Sport</option>
    </select>
    <label>Genre 2</label>
    <select id="genre2">
      <option value="Fighting">Fighting</option>
      <option value="Shooter">Shooter</option>
      <option value="Sport">Sport</option>
    </select>
    <label>Genre 3</label>
    <select id="genre3">
      <option value="Fighting">Fighting</option>
      <option value="Shooter">Shooter</option>
      <option value="Sport">Sport</option>
    </select>
</body>
</html>