Commerce

Ankit, BBA launches you headfirst into a professional career after class 12; it's much more skill specific than a B. Com. If you are very sure that your aptitude matches to the management study only, your only goal is to get into management career, then BBA would be the best choice for you.
If you're good at crunching numbers or want anything to do in the fields of formal finance like CA, then a B.Com degree should be your clear first choice. Though you can pursue an MBA after B.Com, a managerial MBA is better backed up by a BBA background, especially if further supplemented by solid post-undergraduate work experience.
A step further, there are many good universities offering dual/ integrated degrees like BBA-MBA, B.Com-M.Com, B.Com-MBA etc too.

Hi Namit
Follow these steps and you will score well hopefully:
1. Utilize your summer vacation time to give a thorough reading to every chapter of each subject of ncert and if you can make notes simultaneously, it would help you big time in boards.
2. Identify your learning style as ppl learn by listening, writing or visuals so whichever way u learn the best, adopt it.
3. Subjects like maths n physics require lot of practice so assign stipulated time for these two everyday.
4. If you are taking any coaching, clarify your doubts everyday so that concept building is strong enough.
5. Practice as many mock tests as possible to improve your speed and understanding of questions.
6. Eat healthy, exercise a bit or walk and stay stress free. In case off any problem, consult a counselor as we are trained to help you through therapies, techniques etc.