Adra and bqa both are b cat station.whereas prr is an a cat stn.also psngrs are not onky from prr town bt also adjoining areas.if u give 7 trains which originate at prr all will be filled.as question of adra n bqa goes giving them gnwl quota for reserved ticket will be enough.also a coach can specially ve earmarked for adra bqa vsu psngrs as is done in sdah int agniveena and coalfield