<link href="//maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css"> <script src="//maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js"></script> <script src="//cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script> <!------ Include the above in your HEAD tag ----------> <div class="container"> <div class="row"> <form action="formulario.jsp" method="post"> Nombre: <input type="text" name="nombre"> <hr/> Monto(uf): <input type="" name="Monto"> <hr/> Cuotas en Año: <select class="row centered-form"" name="cuotas"> <option value="Seleccione">Seleccione <option value="una">1 <option value="dos">2 <option value="tres">3 <option value="cuatro">4 <option value="cinco">5 <option value="seis">6 <option value="siete">7 </select> <hr/> Seguro Desgravamen: <br/> <input type="Radio" name="preferencia" value= "Si"checked>Si <br/> <input type="Radio" name= "preferencia"value="No">No <hr/> Seguro Contra Incendio: <br/> <input type="Radio" name="preferencia" value= "Si"checked>Si <br/> <input type="Radio" name= "preferencia"value="No">No <p><input type="submit" value="Enviar" class="btn btn-info btn-block"></p> </form> </div> </div>