<link href="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<script src="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/js/bootstrap.min.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<div class="container">
<div class="row">
<form class="form">
<section class="payment-type">
<h2>Select a payment type:</h2>
<input class="pm" type="radio" name="radio3" id="credit" value="credit">
<label class="credit-label four col" for="credit"></label>
<input class="pm" type="radio" name="radio3" id="paypal" value="paypal" checked>
<label class="paypal-label four col" for="paypal"></label>
</section>
</form>
</div>
</div>
