Hello suman rathi

I hope you are doing good . I would like to aware you that admission process of us colleges is completely different from india.  I can surely tell you from wherever you listened this thing is completely rumour or unauthentic . College from which you did your last qualification doesnt matter at all . Factors which are considered at the time of admission are Statment of purpose ,academic record upto some level  , For phd research paper is considered mainly , Letter of recommendation , band scored in language proficiency test . I would advise you try to boost your profile by considering the mentiioned factors

Hope you found this answer helpful. Good luck for your future