Add default item in DropDownList using jQuery in ASP.Net MVC

how add new select index as placeholder "select" with value = 0 using javascript

i think i load data from table , and load it using javascript

but i want add value 0 as selected index when page load

  function loaddepartement() {
       var url = 'MasterData/GetDepartement';
       var selectdepartment = $('#selectdepartement');
       $.getJSON(url, function (data) {
           //selectdepartment.empty();
           //selectdepartment.prepend("<option value= 0 selected='selected'></option>");
           for (var i = 0; i < data.length; i++) {
               selectdepartment.append('<option value="' + data[i].id + '">' + data[i].departement + '</option>');
           }
       });        
   };