Robotics

You San pursue MCA after that pursue EMBEDDED SYSTEMS & HARDWARE + ARTIFICIAL INTELLIGENCE.

Go through the link :
https://www.shiksha.com/engineering/colleges/b-tech-in-robotics-engineering-colleges-india

Robotics and Mechatronics are specialist fields. Most engineering colleges that offer these fields at UG level in India don't have adequate facilities. So, after joining, students are left in a fix and stuck due to lack of opportunities and narrow scope.
Rather than opting for Mechatronics or Robotics, you must opt for Mechanical Engineering. There are few engineering colleges abroad which have good infrastructure for Robotics. Eg. - UIUC, UCLA, Cornell etc.

Below is a selection of the available study options in Germany
University of Freiburg
Technical University of MUNICH
University of ULM
Bielefield University
TU Dortmund University

Refer below mentioned link for complete information :
http://www.roboticsindia.com/entry.php/181-Career-in-Robotics-as-a-Engineer

Yes you can, IIT Delhi, Kanpur and Mumbai offers post graduate course in robotics.

Robotics is interdisciplinary field. Some universities allows Electronics graduate in MS Robotics engineering

You can do B.Tech or B.Sc. in physics honors for the same.