Hi there,
Hope you are doing well.
With 1160 rank in ST category, getting a branch for you is highly unprobable.
The final closing ranks of some lowest branches were:-

• IIT BHU:- B.Tech. + M.Tech. - Pharmaceutical Engineering & Technology (5 years):- 1143
• IIT BHU:- B.Tech. + M.Tech. - Ceramic Engineering (5 years):- 1139
• IIT BHU:- B.Tech. + M.Tech. - Bioengineering with M.Tech in Biomedical Technology (5 years):- 1137
• IIT Roorkee:- Integrated MSc Physics:- 1131

Hope it would help.
Thank You