Hey

The two streams are so different in their basic nature. BSc is Science (for taking this you have to have mathematics, physics and chemistry in your 12th class). For BCom you can apply ffrom Science as well as Commerce background (in some colleges though they have ways of selection which prefers commerce students)

BCom- After this course you can become an accountant or an account excecutive etc. You can go for MBA or Chartered Accountancy (CA) or Company Secretary (CS) or Master of Commerce (M.Com) or Chartered Financial Analyst (CFA) or  Business Accounting and Taxation (BAT) or Certified Management Accountant (CMA) or Financial Risk Manager (FRM) or Certified Financial Planner and much  more. If you are interested in these then go with BCom (it has a lot of scope if you are good at it).

BSc IT- Average salary after this course is around 4lpa. You can get admission in this through state level and national level exams (in the good institutes). After completion of the course you can become IT Support Analyst, Network Engineer, Web Designer ,Software Developer ,Systems Analyst etc

It all comes down to your interest honestly. You will excel at something you find interesting and at what makes you happy and satisfied. My advice will be- do not go with what the society wants but with what you want and what you find most comfortable at.