Responsive with device independant

Question

Hi,

  i am very confused. I know MVC4 with razor.my quations as follows.

 

  1) if i use bootstrap in mvc is it view in all device(iphone,ipad,mobile)

 

  2) How can achieve that develop single asp.net web application but it can be run

      all over devices?(don't want to redevelop device wise pages in that solution)

 

  3) Suggest me what should i use to develop responsive  with device independant

        shopping portable.(like web api,wcf,mvc4,angular,bootstrap,kendo ui)