Hello aspirant,

Yes you can get seat under the osmania university with the TSECET rank 120 under general category in mechanical.  The list of some colleges that you would get is

1.university college of engineering, osmanina university, Hyderabad

Last year cutoff rank for mechanical:2794

2.chaitanya bharathi institute of technology  Hyderbad

Last rank : 5112

3.JNTUH college of engineering  ,Hyderbad

Last year cut off 2364

4.vasavi college of engineering  Hyderbad

Last rank 8644

5.VNR viganana jyothi institute of engineering and technology, Hyderbad

Last rank 8982

You can visit the link given below to know more colleges that you will get

All the best for your future.