The invalid pension is granted under Rule 38 of CCS(Pension) Rules when the Government ** seek invalidation from service for any bodily or mental infirmity whereas disability pension is granted under CCS(EOP) Rules. The CCS (COP) Rules provides that if a Government ** is boarded out of service on account of injury attributable to Government service he shall be granted disability pension which includes service element as well as disability element. Invalid pension and disability pension cannot be combined.