Hello Chaitanya,

Since you have told that you are getting 130-140 marks then your rank may be approximately 34,000-37,000 AIR. This rank can't assure admission in DTU, Delhi. However, there are chances that you can get Biotechnology or other less popular engineering branch there.

Register yourself for B.Tech Companion to check your chances for NITs/IITs.

https://www.careers360.com/btech-companion

Good Luck.