polity class 1 

##Polity complete class cours.......Class-1## making of the constitution/historical background of the constitution (সংবিধান তৈরীর ইতিহাস) for all Competitive exam (wbp si,wbp constable,wbcs ,chsl, CGL,mts,group d, railway,ntpc, and for all exam psc clerk , misslenious