Mechatronics Engineering

Mechatronics is a field that can be considered relatively recent when compared to the various subcategories of engineering (even though it's been around for over 40 years). It is basically is a design process and new form of engineering that includes a combination of mechanical, electrical, telecommunications, control and computer engineering. So, the first thing that comes to anyone's head when thinking of mechatronics is a robot. Robots are the pinnacle of mechatronics engineering and to a certain extent correctly represent what mechatronics is all about. It's a lot of electronics and computer engineering implemented to control a mechanical system. It involves design and manufacturing the actual system, coding micro controllers or PLCs to achieve a certain kind of output and a lot of modeling, dynamics and control of electromechanical systems. It's a huge field. Here's a bunch of applications I picked up from Wikipedia:
Machine Vision, Automation and Robotics, Servo-Mechanics, Sensing and Control Systems, Automotive Engineering, Automotive Equipment in the Design of Subsystems such as Anti-lock Braking Systems, Computer-machine controls, such as computer-driven machines like IE, CNC, Milling Machines, Expert Systems, Industrial Goods, Consumer Products, Mechatronics Systems, Medical Mechatronics, Medical Imaging Systems, Structural Dynamic Systems Transportation and Vehicular Systems. Mechatronics as the new language of the automobile computer aided and integrated manufacturing systems, Computer-aided Design, Engineering and Manufacturing Systems, Packaging and Microcontrollers/PLCs.
Coming to the point as to whether you should do it, well that depends on how committed you are to this field. Since it's a specialisation in a way, you should be kinda certain that this is what you want. If you're uncertain, I'd suggest you take up mechanical or electrical separately and probably do a Masters in it later if you're sure. Mechatronics is one of the most sought after and most interesting fields there is in the world with a wide range of application. It's literally going to everywhere within the next few years. So, it's definitely something an engineer would want to be a part of.

Mechatronics is a multidisciplinary field of Science that includes a combination of mechanical engineering, electronics, computer engineering, telecommunications engineering, systems engineering and control engineering. As technology advances, the sub-fields of engineering multiply and adapt. Mechatronics' aim is a design process that unifies these sub-fields. Originally, mechatronics just included the combination of mechanics and electronics, therefore the word is a combination of mechanics and electronics; however, as technical systems have become more and more complex the definition has been broadened to include more technical areas. There are over 2 B.Tech in Mechatronics Engineering colleges in Bangalore Offering 2 Courses. Please refer to the link provided below for a list of these colleges. https://www.shiksha.com/b-tech/colleges/b-tech-in-mechatronics-engineering-colleges-Bangalore
Scope for Mechatronics Engineering in India: Though there is no specific data to track employment for mechatronics professionals, in the recent years there has been increasing demand for mechatronics professionals. About 5% growth in terms of employment in comparison to electrical engineers. The median salary can be around $82,100. Regards.

Can't say but, It will get you a seat in the branches of print and media, industrial production, but not on the day of the first round of counselling. You would need to apply for the waiting list, and in the 2nd or 3rd round of councelling you could get the above mentioned branches. You won't be able to get the branches of automobile engineering, electrical and electronics, mechatronics, mechanical, and branches like computer Science, electronics and communications, computer and communication, information technology are not to be considered. It would be better if you apply for the second and third attempts of MU-OET and prepare well for those and try and give your best, and you will easily get better marks then. (You could easily get these engineering branches in Manipal University, Jaipur or Sikkim Manipal University, if you want to, but the quality of education would not be better than it is here, in MIT, Manipal. )
Thank you.