Hi
The branch of engineering which comes closest to robotics in India is  B.Tech in Mechatronics.
If you want to go ahead and take on the career of a Robotic Engineer then your your knowledge should be more than average in science and mathematics.

The basic eligibility for being able to apply for B.Tech in Robotics is that students should have passed his/her class 12 examinations with science stream (Physics, Chemsitry and Maths) from a recognized state or national level board of education with a minimum of 50% marks.

A Bachelor degree is required in order to pursue Masters degree in Robotics.
In robotics you can choose both hardware and software side based on your interest. If you wish to go to software side Now-a-days the artificial intelligence is playing a key role. Best to make aware this you should read the technical journals. Which help you improve your knowledge in robotics.
Thank you.

Cs branch in btech is the best choice..