Your query is not clear. It is not known on thich ground you have been denied apointment. Whether it is denied you you are just inwaiting list.
First of all it is not job in place of your father , it s merely a compassinate job.
Such jobs are given only out of 5% of Class III&IV posts (in direct recruitment quota) and comparative merit of the applicants is assessed. Remember reservation beyond 50% is not allowed as per Supreme Court guidelines. The Govt sector jobs are already reserved to the extent of 50% (15 SC+ 27 OBC + 7 ST). Therefore even that 5% is to be taken from the proportionately by vertical reservation from the respective share of Sc/ST/OBC/gen category posts depending upon the category of the applicant. That being the case the share if gen candidate is 5% of 50% = 2.5% out of total Class III&IV posts (in direct recruitment quota) , and OBC it is 5% of 27% = 1.25% out of total Class III&IV posts (in direct recruitment quota) , for SC 5% of 15% = .75% out of total Class III&IV posts (in direct recruitment quota) , and for ST it will be 5% of 7.5% = 38% out of total Class III&IV posts. No job can be offered beyond that limit even if the applicants are large number. The slots reserved for Handicapped, ex-servicemen and sports persons are also allocated in the same manner to ensure that horizontal reservation does not exceed 50%. So comparative merit is drawn based on the indignant condition of each family.