diff --git a/admin/cli/quiztableadditions.php b/admin/cli/quiztableadditions.php
index 0000000..d3d2b6c
--- /dev/null
+++ b/admin/cli/quiztableadditions.php
@@ -0,0 +1,68 @@
+<?php
+// This file is part of Moodle - http://moodle.org/
+//
+// Moodle is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Moodle is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
+/**
+ * @package    core
+ * @subpackage cli
+ * @copyright  2017 Amrata Ramchandani
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+define('CLI_SCRIPT', true);
+
+require(__DIR__.'/../../config.php');
+require_once($CFG->libdir.'/clilib.php');
+
+list($options, $unrecognized) = cli_get_params(array('help' => false), array('h' => 'help'));
+
+if ($unrecognized) {
+    $unrecognized = implode("\n  ", $unrecognized);
+    cli_error(get_string('cliunknowoption', 'admin', $unrecognized), 2);
+}
+
+if ($options['help']) {
+    $help =
+"Adds new column 'enableclear' in moodle quiz table
+Adds 2 new records in moodle config plugins.
+The records are (quiz,enableclear_adv,1) and (quiz,enableclear,0)
+
+Options:
+-h, --help            Print out this help
+
+Example:
+\$sudo -u www-data /usr/bin/php admin/cli/quiztableadditions.php
+";
+
+    echo $help;
+    exit(0);
+}
+
+global $DB;
+
+$dbman = $DB->get_manager();
+
+$table = new xmldb_table('quiz');
+$field = new xmldb_field('enableclear',XMLDB_TYPE_INTEGER,'4');
+
+if (!$dbman->field_exists($table, $field)) {
+	$dbman->add_field($table, $field);
+}
+
+set_config('enableclear_adv', '1', 'quiz');
+set_config('enableclear', '0', 'quiz');
+
+purge_all_caches();
+exit(0);
diff --git a/mod/quiz/attempt.php b/mod/quiz/attempt.php
index 96b8e1c..18136c8 100755
--- a/mod/quiz/attempt.php
+++ b/mod/quiz/attempt.php
@@ -41,6 +41,13 @@ $attemptid = required_param('attempt', PARAM_INT);
 $page = optional_param('page', 0, PARAM_INT);

 $attemptobj = quiz_attempt::create($attemptid);
+
+// Check for clear button option and insert corresponding JS.
+if($attemptobj->get_quiz()->enableclear) {
+	$PAGE->requires->jquery();
+	$PAGE->requires->js( '/mod/quiz/clearbutton.js');
+}
+
 $page = $attemptobj->force_page_number_into_range($page);
 $PAGE->set_url($attemptobj->attempt_url(null, $page));

diff --git a/mod/quiz/clearbutton.js b/mod/quiz/clearbutton.js
index 0000000..8631a0b
--- /dev/null
+++ b/mod/quiz/clearbutton.js
@@ -0,0 +1,28 @@
+jQuery(function($) {
+
+    if ($("input[type]").is(":radio")) {
+        $(".answer").append("<button type='button' name='clear' >Clear</button>");
+    }
+
+    if ($("input[type=radio]:checked").length > 0) {
+    	$('button[name=clear]').show();
+    }
+    else{
+    	$('button[name=clear]').hide();
+    	}
+    
+
+    $("input[type=radio]").on('click', function() {
+        $('button[name=clear]').show();
+    });
+
+    $('button[name=clear]').on('click', function() {
+        $(this).closest('.answer').find(':radio').prop('checked', false);
+        $('button[name=clear]').hide();
+    });
+
+    if ($('.content').parent().hasClass("deferredfeedback")) {
+        if ($('.answer .r0 input').prop('disabled')) {
+            $("button[name=clear]").remove();
+        }
+    } else {
+        if (!($('div.im-controls').length)) {
+            $("button[name=clear]").remove();
+        }
+    }
+
+});

diff --git a/mod/quiz/db/install.xml b/mod/quiz/db/install.xml
index d41ecbc..78765e1 100755
--- a/mod/quiz/db/install.xml
+++ b/mod/quiz/db/install.xml
@@ -20,6 +20,7 @@
         <FIELD NAME="canredoquestions" TYPE="int" LENGTH="4" NOTNULL="true" DEFAULT="0" SEQUENCE="false" COMMENT="Allows students to redo any completed question within a quiz attempt."/>
         <FIELD NAME="attempts" TYPE="int" LENGTH="6" NOTNULL="true" DEFAULT="0" SEQUENCE="false" COMMENT="The maximum number of attempts a student is allowed."/>
         <FIELD NAME="attemptonlast" TYPE="int" LENGTH="4" NOTNULL="true" DEFAULT="0" SEQUENCE="false" COMMENT="Whether subsequent attempts start from teh answer to the previous attempt (1) or start blank (0)."/>
+        <FIELD NAME="enableclear" TYPE="int" LENGTH="4" NOTNULL="true" DEFAULT="0" SEQUENCE="false" COMMENT="Whether the clear button should be enabled for multichoice questions"/>
         <FIELD NAME="grademethod" TYPE="int" LENGTH="4" NOTNULL="true" DEFAULT="1" SEQUENCE="false" COMMENT="One of the values QUIZ_GRADEHIGHEST, QUIZ_GRADEAVERAGE, QUIZ_ATTEMPTFIRST or QUIZ_ATTEMPTLAST."/>
         <FIELD NAME="decimalpoints" TYPE="int" LENGTH="4" NOTNULL="true" DEFAULT="2" SEQUENCE="false" COMMENT="Number of decimal points to use when displaying grades."/>
         <FIELD NAME="questiondecimalpoints" TYPE="int" LENGTH="4" NOTNULL="true" DEFAULT="-1" SEQUENCE="false" COMMENT="Number of decimal points to use when displaying question grades. (-1 means use decimalpoints.)"/>
diff --git a/mod/quiz/lang/en/quiz.php b/mod/quiz/lang/en/quiz.php
index aab2fcf..9957d46 100755
--- a/mod/quiz/lang/en/quiz.php
+++ b/mod/quiz/lang/en/quiz.php
@@ -183,6 +183,7 @@ $string['configdelay1'] = 'If you set a time delay, then a student has to wait f
 $string['configdelay1st2nd'] = 'If you set a time delay here, the student cannot start their second attempt until this much time has passed since the end of their first attempt.';
 $string['configdelay2'] = 'If you set a time delay here, then a student has to wait for that time before they can attempt their third or later attempts.';
 $string['configeachattemptbuildsonthelast'] = 'If multiple attempts are allowed then each new attempt contains the results of the previous attempt.';
+$string['configenableclearbutton'] = 'If enabled, the clear button will be added in the quiz with multichoice questions in order to support an option to clear selected radio buttons';
 $string['configgrademethod'] = 'When multiple attempts are allowed, which method should be used to calculate the student\'s final grade for the quiz.';
 $string['configintro'] = 'The values you set here define the default values that are used in the settings form when you create a new quiz. You can also configure which quiz settings are considered advanced.';
 $string['configmaximumgrade'] = 'The default grade that the quiz grade is scaled to be out of.';
@@ -319,6 +320,8 @@ otherwise your attempt will not be counted.';
 $string['emailoverduesmall'] = 'You did not submit your attempt at {$a->quizname}. Please go to {$a->attemptsummaryurl} before {$a->attemptgraceend} if you would still like to submit.';
 $string['emailoverduesubject'] = 'Attempt now overdue: {$a->quizname}';
 $string['empty'] = 'Empty';
+$string['enableclearbutton'] = 'Enable clear button for single answer questions';
+$string['enableclearbutton_help'] = 'If enabled, the clear button will be added in the quiz with multichoice questions in order to support an option to clear selected radio buttons';
 $string['enabled'] = 'Enabled';
 $string['endtest'] = 'Finish attempt ...';
 $string['erroraccessingreport'] = 'You cannot access this report';
diff --git a/mod/quiz/mod_form.php b/mod/quiz/mod_form.php
index 6a97bd1..c43a417 100755
--- a/mod/quiz/mod_form.php
+++ b/mod/quiz/mod_form.php
@@ -216,6 +216,12 @@ class mod_quiz_mod_form extends moodleform_mod {
             $mform->disabledIf('attemptonlast', 'attempts', 'eq', 1);
         }

+        // Enable clear button for single answer questions.
+        $mform->addElement('selectyesno', 'enableclear', get_string('enableclearbutton', 'quiz'));
+        $mform->addHelpButton('enableclear', 'enableclearbutton', 'quiz');
+        $mform->setAdvanced('enableclear', $quizconfig->enableclear_adv);
+        $mform->setDefault('enableclear', $quizconfig->enableclear);
+
         // -------------------------------------------------------------------------------
         $mform->addElement('header', 'reviewoptionshdr',
                 get_string('reviewoptionsheading', 'quiz'));
diff --git a/mod/quiz/settings.php b/mod/quiz/settings.php
index ef504ce..aa410ce 100755
--- a/mod/quiz/settings.php
+++ b/mod/quiz/settings.php
@@ -135,6 +135,11 @@ if ($ADMIN->fulltree) {
             get_string('configeachattemptbuildsonthelast', 'quiz'),
             array('value' => 0, 'adv' => true)));

+    // Clear Button for multichoice questions.
+    $quizsettings->add(new admin_setting_configcheckbox_with_advanced('quiz/enableclear',
+    		get_string('enableclearbutton', 'quiz'), get_string('configenableclearbutton', 'quiz'),
+    		array('value' => 0, 'adv' => true)));
+
     // Review options.
     $quizsettings->add(new admin_setting_heading('reviewheading',
             get_string('reviewoptionsheading', 'quiz'), ''));
diff --git a/question/engine/questionattempt.php b/question/engine/questionattempt.php
index fa110dd..1f7ab6d 100755
--- a/question/engine/questionattempt.php
+++ b/question/engine/questionattempt.php
@@ -408,6 +408,17 @@ class question_attempt {
         return end($this->steps);
     }

+    // Get the last step which has data as answer or _order of a particular question.
+    public function get_unfinished_step() {
+    	foreach($this -> get_reverse_step_iterator() as $step) {
+    		$name = array('answer', '_order');
+    		foreach($name as $key) {
+    			if ($step -> has_qt_var($key))
+    				return $key;
+    		}
+    	}
+    }
+
     /**
      * @return boolean whether this question_attempt has autosaved data from
      * some time in the past.
@@ -1230,6 +1241,15 @@ class question_attempt {
     public function process_action($submitteddata, $timestamp = null, $userid = null, $existingstepid = null) {
         $pendingstep = new question_attempt_pending_step($submitteddata, $timestamp, $userid, $existingstepid);
         $this->discard_autosaved_step();
+
+        /** While clearing the quiz option,we are trying to bring the question attempt step data to '_order'
+         * and we could find that '_order' data only in initial step i.e step[0] **/
+
+        if( empty($submitteddata)){
+        	$step_zero_data = $this->steps[0]->get_all_data();
+        	$pendingstep->set_data($step_zero_data);
+        }
+
         if ($this->behaviour->process_action($pendingstep) == self::KEEP) {
             $this->add_step($pendingstep);
             if ($pendingstep->response_summary_changed()) {
diff --git a/question/engine/questionattemptstep.php b/question/engine/questionattemptstep.php
index c0bb6fd..6e73c17 100755
--- a/question/engine/questionattemptstep.php
+++ b/question/engine/questionattemptstep.php
@@ -370,6 +370,12 @@ class question_attempt_step {
         return $this->data;
     }

+    // Setting Step Data.
+    public function set_data($data){
+    	$this->data = $data;
+    }
+
+
     /**
      * Set a metadata variable.
      *
diff --git a/question/type/multichoice/question.php b/question/type/multichoice/question.php
index 09b9493..459e598 100755
--- a/question/type/multichoice/question.php
+++ b/question/type/multichoice/question.php
@@ -259,7 +259,8 @@ class qtype_multichoice_single_question extends qtype_multichoice_base {
     }

     public function get_response(question_attempt $qa) {
-        return $qa->get_last_qt_var('answer', -1);
+    		$laststep_name=$qa->get_unfinished_step();
+    		return $qa->get_last_qt_var($laststep_name, -1);
     }

     public function is_choice_selected($response, $value) {