Hi,

Electronics and Communication (E&C) (Subbranch of EEE) Engineering is best because ECE includes industrial processes and techniques of industrial automation. For robotics you need to have knowledge about C language and basics of electronics thus, ECE includes more communication part like Mobile communication, Satellite communication etc. Though communication also plays vital role in transferring data.

Other thing is that none of the single branch will include Robotics as individual subject in curriculum. May be in the above branches like EEE, EIE, CSE, Mech will include Robotics and Automation as a subject but it is not a robotics which is a thinking. It is industrial robotics.

If you are interested in Robotic you can either pursue it for Masters after completing your B-tech/B.E in any of above mentioned branches. Other thing is you can learn Robotics by doing projects.

I would suggest you to take up electronics and communication engineering (ECE)

ECE will not only help you with robotics but also it will open several opportunities for you in future. It will help you with electronic circuits knowledge, communication methods and scheme, interconnection of electronics with communication systems, wireless devices, robotics, control systems etc. Core companies also have opening for ECE.

So you can go with ECE.

Hope this helps.
All the best