<label class="radio-inline">
    <input type="radio" name="b_type" value="A" > A
  </label>
  <label class="radio-inline">
    <input type="radio" name="b_type" value="B" > B
  </label>
  <label class="radio-inline">
    <input type="radio" name="b_type" value="C" > C
  </label>
  <label class="radio-inline">
    <input type="radio" name="b_type" value="D" > D
  </label>



<div id="person-block-A" class="block-div">AAA</div>
<div id="person-block-B" class="block-div">BBB</div>
<div id="person-block-C" class="block-div">CCC</div>
<div id="person-block-D" class="block-div">DDD</div>

<script>
$('input[type="radio"][name="b_type"]').on('change',function(){
  var sel = $(this).val();
    $('.block-div').hide();
    $('#person-block-'+sel).show();
});
</script>