How can i get unique collection to load from database in blade file

I want to load all unique subjects like in the database. and Each Subject contains multiple questions and each question contains multiple answers. I do not whether this process is correct or not but with the process, .i got only one subject with multiple questions and answers. I hope you understand my problem. There are exams_answers database where I want to view the result of all subject -> questions ->answers by the same user_id and exam_id.

This is my database of ExamAnswer

This is my Controller File where I want to get the result in a blade file like this: There are two subject_id 1 & 2. I want to get two subjects and each subject contain questions and each question contain the answers.

public function result($id)
{
   $results = ExamAnswer::where('exam_id', $id)->with('subject')->get();
     foreach ($results as $result){
            $subjects[] = $result->subject;
            $object = collect($subjects);
            $uniqueSubject = $object->unique();
            $uniqueSubject->values()->all();
        }
        $allSubject = $uniqueSubject->all();
    return view('frontend.mock.result',compact('results','allSubject));
}

This is my ExamAnswer Model

                    public function subject()
                        {
                          return $this->belongsTo(Subject::class, 'subject_id');
                        }

This is Subject Model

                  public function results(){
                          return $this->belongsTo('App\Result','subject_id');
                      }

This is my blade file. I want to load all unique subjects like in the database there are two ids 1 and 2. and Each Subject contains multiple questions and each question contains multiple answers.

         <div>
              @foreach($allSubject as $index => $subject) 
                 @php $result=\App\ExamAnswer::where('exam_id', $exam->id)- 
                   >where('subject_id',$subject->id)->with('question')->with('question.answers')- 
                  >get();
              @endphp
               @foreach($result as $index=> $result)
                      <span>) {!! $result->question->question_body !!}  </span>
                          @foreach($result->question->answers as $index => $answer)
                          ) {!! $answer->answer_body !!}  
                          @endforeach
               @endforeach
        </div> 

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