Dear Student,

These are some of the newly introduced branches of B.tech and they are the mainly the specialization of the core branches.

Robotics is the specialization branch of Mechanical engineering and this branch is accepted by both Army TGC and Navy UES, so you don't need to worry about that definitely you will be eligible for the course of defenses forces.

And some other options to join defense forces with B.tech degree is AFCAT, CDS, INET, SSC-Tech, etc.

Good Luck :)