Mechanical Engineering

The definition of best, varies from person to person and is influenced by personal inclinations and ones strength for e. g. some people might to go with regular stream like CS mechanical, Electronics and some might go with not so common branches like Robotics, petroleum, mining. Opt for the engineering branch that you love the most and are most passionate about and analyze the future work conditions, scope and growth prospects before taking admission. You can also opt for psychometric test comprising of Aptitude, personality and career interest to clear confusion.

Mechanical engineering and MBA are whole together a different field. Though, you can do MBA after ME, but if you want to pursue MBA, you have to have a Bachelor's degree. MBA is a management field, so pursue something that is related to business and management for e g. BBA.

My friend, you have many options!
1. B.Tech/B.E
2. NDA (if you are interested in army)
If you want to do job then many organisation and even PSU's offer recruitment for Polytechnic student. Like BHAIL, NTPC, BPCL etc. For any further doubts or query, feel free to ask.
Best of luck.

Yes, MBA is a good option after B.Tech in mechanical engineering. You can get unto specializations like Operations, Supply Chain, Construction Management, Marketing and Finance. MBA will give you a business aspect of the corporate world. You will be dealing more with trade and business-oriented work. Technical skills + business knowledge is much needed in today's world. Hence it's good to go for MBA after B.Tech.

Yes, you can pursue B.Tech in mechanical engineering. You need to appear for the lateral entry entrance exam.

Mechanical engineering is the discipline that applies engineering, physics and materials Science principles to design, analyze, manufacture, and maintain mechanical systems. It is one of the oldest and the broadest of the engineering disciplines.

As you have a diploma now, you can pursue various Bachelor degrees available in Maharaja Sayajirao University of Baroda. But some degrees do require specifications about your field. So check out the require criterion about the degree. For further details you can visit the official website, which is- http://www.msubaroda.ac.in/