I want to inform you that TISS doesn't take any separate exam for Development studies other than TISSNET,
You can get admission in TISS through cracking TISSNET .
Candidate must be graduate or its equivalent (under the 10+2+3 or 10+2+4 or 10+2+2+1 year bridge course pattern of study or any other pattern fulfilling the mandatory requirements of 15 years formal education) in any stream from a recognized university/ college.
Final year appearing candidates can also apply on provisional basis.
Hope this helps,
All the best !