In order to get the seat in Osmania institute you will have to score around 500 marks for the govt. seat in the college cosidaering your reservation. The last year cutoff for the state quota seat for the osmania univesity was 471 marks with the rank 33982 for the Backword Caste category. In the Gandhi  university the cutoff marks were 469 with the rank 34737 fot the state quota seats. So on an average if could score the marks around and upto 500 then it would be the safer side and the admission would be smooth and easy for you.