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IIST is Indian Institute of Space science and Technology which offers B.Tech in avionics and aerospace engineering.  It also offers dual degreee programs.The admission process is based on JEE Mains rank.

You can go through the official website of IIST for further details.

https://www.iist.ac.in/

The IIST cut offs , admission process and other details are given in the following link.

https://engineering.careers360.com/articles/iist-btech-admission