gistfile1.txt

<div class="input-group mb-3">
                    <form method="POST" action="{{route('show.student', $student->id)}}">
                        <select name="student_id" class="custom-select">
                            <option selected disabled>Pasirinkite vardą</option>
                            @foreach($students as $student)
                                <option value="{{ $student->id }}">{{$student->name . " " . "$student->surname"}}</option>
                            @endforeach
                        </select>
                        <input type="submit" value="Rodyti">
                    </form>
</div>