/******************************************
 * Begin DISC manipulation script
 ******************************************/
function shuffleArray(array) {
  for (var i = array.length - 1; i > 0; i--) {
    var j = Math.floor(Math.random() * (i + 1));
    var temp = array[i];
    array[i] = array[j];
    array[j] = temp;
  }
  return array;
}
 
$(document).on('ready pjax:complete',function() {
  // Identify this question
    var thisQuestion = $('.array-flexible-column:eq(0)'); 
 
  var elements = $('tr.answers-list', thisQuestion).detach().toArray();
  shuffleArray(elements);
  $('tr.answers-list', thisQuestion).remove();
  $.each(elements, function(i, el) {
    $('table.subquestion-list tbody:eq(0)', thisQuestion).append(el);
  });
});
 
 
$(document).ready(function() {    
 
// Identify the questions -- FOR DISC
  var thisQuestion = $('[id^=question]');
 
  // Listener on the radios
  $('input.radio', thisQuestion).on('click', function(e) {
    $('input[type="radio"]', thisQuestion).prop('disabled', false);
    $('input.radio:checked', thisQuestion).each(function(i) {
      $(this).closest('tr.answers-list').find('input[type="radio"]').not(this).prop('disabled', true);
    });
  });
 
   // Initial settings
  $('input.radio:checked', thisQuestion).each(function(i) {
    $(this).closest('tr.answers-list').find('input[type="radio"]').not(this).prop('disabled', true);
  });
});
/******************************************
 * End DISC manipulation script
 ******************************************/

$('input.radio', thisQuestion).on('click', function(e) {

<input class="radio" type="radio" name="451344X410X7685SM" value="D1" id="answer451344X410X7685SM-D1" 
onclick="checkconditions(this.value, this.name, this.type)">

<input type="radio" name="186194X76X854SM" value="S1" id="answer186194X76X854SM-S1">

$(document).on('ready pjax:complete',function() {    
 
  // Identify the questions -- FOR DISC
  var thisQuestion = $('.array-flexible-column:eq(0)');
 
  function handleRadios() {
    $('input:radio', thisQuestion).prop('disabled', false);
    $('.disabled-item', thisQuestion).removeClass('disabled-item');
    $('input:radio:checked', thisQuestion).each(function(i) {
      var thisRow = $(this).closest('tr.answers-list');
      var otherRadios = $('input:radio', thisRow).not(this);
      $(otherRadios).prop('disabled', true);
      $(otherRadios).closest('td').addClass('disabled-item');
    });
  }
 
  // Listener on the radios
  $('input:radio', thisQuestion).on('click', function(e) {
    handleRadios();
  });
 
  // Initial settings
  handleRadios();
});

.disabled-item {
  cursor:not-allowed !important;
}