Passing data through for loop into database laravel

I am trying to send values in database through this loop, its basically a quiz system where i am updating data by this query. there are 5 options but i dont know why it is only updating first value even i updated 5th option. is there any problem in code please help me to find out a bug in it.

$chapter_id = $request->chapter_id;
        $questions = Question::orderBy('id', 'asc')->paginate(25);
        $question = Question::findOrF

for($a=1; $a<=5; $a++){
            $option = 'text_option_'. $a ;

            // if($option != ''){
            $question_option = QuestionsOption::where('question_id', $question->id)->first();
                // $question_option -> question_id = $question->id;
            $question_option -> question_text = $request -> $option;
            $question_option -> correct    = $request->input('correct_' . $a);
            // }
            $question_option->save();
        }

via Chebli Mohamed