<div class="btn-group">

  <input type="radio" class="btn-check" name="options" id="option1" autocomplete="off" checked />

  <label class="btn btn-primary" for="option1" data-mdb-ripple-init>Is this selected</label>

​

  <input type="radio" class="btn-check" name="options" id="option2" autocomplete="off" />

  <label class="btn btn-primary" for="option2" data-mdb-ripple-init>Or is this selected</label>

</div>