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<!DOCTYPE html>
<html>
<head>
<script src="http://code.jquery.com/jquery-git2.js"></script>
  <meta charset="utf-8">
  <title>JS Bin</title>
</head>
<body>
<select name="answer" class="question-answer">
    <option value="-1">Choose value</option>
     <option value="1">1</option>
    <option value="2">2</option>
    <option value="3">3</option>
    <option value="4">4</option>
</select>
​
<select name="answer" class="question-answer">
    <option value="-1">Choose value</option>
     <option value="1">1</option>
    <option value="2">2</option>
    <option value="3">3</option>
    <option value="4">4</option>
</select>
​
<select name="answer" class="question-answer">
    <option value="-1">Choose value</option>
     <option value="1">1</option>
    <option value="2">2</option>
    <option value="3">3</option>
    <option value="4">4</option>
</select>
​
<select name="answer" class="question-answer">
    <option value="-1">Choose value</option>
     <option value="1">1</option>
    <option value="2">2</option>
    <option value="3">3</option>
    <option value="4">4</option>
</select>
​
<div id="result"></div>
​
<button id="submit">Test</button>
</body>
</html>
 
​
 
$('button').click(function(){
  
  var values = ['1','2','3','4'];
  var selectValues = [];
  
  $('select').each(function(){
    selectValues.push($(this).val());
  });
  
  if($(values).not($(values).not(selectValues).get()).get().length !== values.length) {
     $('#result').html('All values are not used');
  }
  else {
    $('#result').html('All values ARE USED :)');
  }
​
});
Output 300px

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