i have done my b.tech with 75% but i dont want to go in my engineering field so what should i do
If you don't want to pursue your career in engineering, then you can build your career in following stream:
1. B.Arch
2. Bachelor's of computer science
3. Bachelor's of Planning
4. In Defense field through NDA
5. B.Sc with speciality
These are some better options.
Good luck