diff --git a/app/Resources/public/css/base.css b/app/Resources/public/css/base.css
index f52c1e2088..a1b6848946 100644
--- a/app/Resources/public/css/base.css
+++ b/app/Resources/public/css/base.css
@@ -2487,6 +2487,13 @@ div.admin_section h4 {
     float: left;
 }
 
+.ribbon .rib-info  {
+    background: deepskyblue;
+    border-top: none;
+    border-bottom: none;
+    float: left;
+}
+
 .ribbon .rib-gray {
     background: #cccccc;
     background-image: -ms-linear-gradient(top, #bbbbbb, #cccccc);
diff --git a/main/exercise/exercise.class.php b/main/exercise/exercise.class.php
index 3436fad456..87e6bd90ef 100755
--- a/main/exercise/exercise.class.php
+++ b/main/exercise/exercise.class.php
@@ -3445,6 +3445,8 @@ class Exercise
         if ($debug) {
             error_log('Start answer loop ');
         }
+
+        $userAnsweredQuestion = false;
         for ($answerId = 1; $answerId <= $nbrAnswers; $answerId++) {
             $answer = $objAnswerTmp->selectAnswer($answerId);
             $answerComment = $objAnswerTmp->selectComment($answerId);
@@ -3476,6 +3478,9 @@ class Exercise
                         $result = Database::query($sql);
                         $choice = Database::result($result, 0, 'answer');
 
+                        if ($userAnsweredQuestion === false) {
+                            $userAnsweredQuestion = !empty($choice);
+                        }
                         $studentChoice = $choice == $answerAutoId ? 1 : 0;
                         if ($studentChoice) {
                             $questionScore += $answerWeighting;
@@ -5353,6 +5358,7 @@ class Exercise
             'threadhold2' => $threadhold2,
             'threadhold3' => $threadhold3,
         ];
+
         if ($from == 'exercise_result') {
             // if answer is hotspot. To the difference of exercise_show.php,
             //  we use the results from the session (from_db=0)
@@ -5754,7 +5760,7 @@ class Exercise
             }
         }
 
-        $return_array = [
+        $return = [
             'score' => $questionScore,
             'weight' => $questionWeighting,
             'extra' => $extra_data,
@@ -5762,9 +5768,10 @@ class Exercise
             'open_answer' => $arrans,
             'answer_type' => $answerType,
             'generated_oral_file' => $generatedFile,
+            'user_answered' => $userAnsweredQuestion,
         ];
 
-        return $return_array;
+        return $return;
     }
 
     /**
diff --git a/main/exercise/exercise_show.php b/main/exercise/exercise_show.php
index 8f0b03e040..3010841767 100755
--- a/main/exercise/exercise_show.php
+++ b/main/exercise/exercise_show.php
@@ -925,6 +925,10 @@ foreach ($questionList as $questionId) {
         $score['score'] = $my_total_score;
         $score['weight'] = $my_total_weight;
         $score['comments'] = isset($comnt) ? $comnt : null;
+
+        if (isset($question_result['user_answered'])) {
+            $score['user_answered'] = $question_result['user_answered'];
+        }
     }
 
     if (in_array($objQuestionTmp->type, [FREE_ANSWER, ORAL_EXPRESSION, ANNOTATION])) {
diff --git a/main/exercise/question.class.php b/main/exercise/question.class.php
index 16638f9b4a..9c6ba3922a 100755
--- a/main/exercise/question.class.php
+++ b/main/exercise/question.class.php
@@ -2005,28 +2005,42 @@ abstract class Question
             $class = 'success';
         }
 
-        if (in_array($this->type, [FREE_ANSWER, ORAL_EXPRESSION, ANNOTATION])) {
-            $score['revised'] = isset($score['revised']) ? $score['revised'] : false;
-            if ($score['revised'] == true) {
-                $scoreLabel = get_lang('Revised');
-                $class = '';
-            } else {
-                $scoreLabel = get_lang('NotRevised');
-                $class = 'warning';
-                if (isset($score['weight'])) {
-                    $weight = float_format($score['weight'], 1);
-                    $score['result'] = ' ? / '.$weight;
-                }
-                $model = ExerciseLib::getCourseScoreModel();
-                if (!empty($model)) {
-                    $score['result'] = ' ? ';
-                }
+        switch ($this->type) {
+            case FREE_ANSWER:
+            case ORAL_EXPRESSION:
+            case ANNOTATION:
+                $score['revised'] = isset($score['revised']) ? $score['revised'] : false;
+                if ($score['revised'] == true) {
+                    $scoreLabel = get_lang('Revised');
+                    $class = '';
+                } else {
+                    $scoreLabel = get_lang('NotRevised');
+                    $class = 'warning';
+                    if (isset($score['weight'])) {
+                        $weight = float_format($score['weight'], 1);
+                        $score['result'] = ' ? / '.$weight;
+                    }
+                    $model = ExerciseLib::getCourseScoreModel();
+                    if (!empty($model)) {
+                        $score['result'] = ' ? ';
+                    }
 
-                $hide = api_get_configuration_value('hide_free_question_score');
-                if ($hide === true) {
-                    $score['result'] = '-';
+                    $hide = api_get_configuration_value('hide_free_question_score');
+                    if ($hide === true) {
+                        $score['result'] = '-';
+                    }
                 }
-            }
+                break;
+            case UNIQUE_ANSWER:
+                if ($exercise->results_disabled == RESULT_DISABLE_SHOW_ONLY_IN_CORRECT_ANSWER) {
+                    if (isset($score['user_answered'])) {
+                        if ($score['user_answered'] === false) {
+                            $scoreLabel = get_lang('Unanswered');
+                            $class = 'info';
+                        }
+                    }
+                }
+                break;
         }
 
         // display question category, if any
@@ -2038,6 +2052,7 @@ abstract class Question
         if ($show_media) {
             $header .= $this->show_media_content();
         }
+
         $scoreCurrent = [
             'used' => isset($score['score']) ? $score['score'] : '',
             'missing' => isset($score['weight']) ? $score['weight'] : '',
diff --git a/main/inc/lib/exercise.lib.php b/main/inc/lib/exercise.lib.php
index 3b5704e2f0..a5d0003ef9 100644
--- a/main/inc/lib/exercise.lib.php
+++ b/main/inc/lib/exercise.lib.php
@@ -4678,6 +4678,7 @@ EOT;
                         'score' => $my_total_score,
                         'weight' => $my_total_weight,
                         'comments' => $comnt,
+                        'user_answered' => $result['user_answered'],
                     ];
                 }